ldp.html
author John Arwe
Fri, 07 Feb 2014 13:25:51 -0500
changeset 469 6970791bad8e
parent 468 f960af656afb
child 470 eb040e50a66f
permissions -rw-r--r--
LDP-BCs use contains not member for membership triples
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<!DOCTYPE html>
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<!-- 
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 Editor TODO:
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   - Search "TODO" within this document.
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   - Once companion documents (best practices, primer) have URLs, link to them.  Search on "companion".
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   - Once the membership* names stabilize, take a pass through for "membership consistent value", membership-constant-URI
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     and see if there is a friendlier way to phrase it.
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   - Paging intro: add 3rd example showing header linkage amongst pages and (HEAD on) the base resource.
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     Maybe also insert HEAD on base as new first example instead of relying on text alone.
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   - The ReSpec SPARQL QUERY link is http://www.w3.org/TR/rdf-sparql-query/ , which has highlighted text
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	referring readers to SPARQL 1.1.  Which normative reference do we want?
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 Various pre-LC comments:
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    - 5.2.5.1 For a given triple T with a subject C of the LDPC and predicate of ldp:containsRelation, 
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	  5.2.5.2 For a given triple T with a subject C of the LDPC and predicate of ldp:containedByRelation, 
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	  5.2.10 Some LDPC's have membership object's that are not directly URIs minted upon LDPC member creation, 
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	  (JohnA) I found these particularly hard to read.  And I perpetrated the SortCollation paragraphs.  
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	  Links to examples might be an 80-20 solution. 
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	- 5.3.1: I'd change the link to the example ("as in the example") to refer the concrete example #, I think example 9. 
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	  Currently does not work when printing.
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 Misc during LC comments:
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    - http://lists.w3.org/Archives/Public/public-ldp/2013Aug/0002.html
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      #1 Should update example in 5.1.3 to be more clear on what the request vs base URI is.  Also example is missing ldp:nextPage.
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 -->
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<html>
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  <head>
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    <title>Linked Data Platform 1.0</title>
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    <!-- Changed by: , 05-Feb-2014 -->
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    <meta http-equiv='Content-Type' content='text/html;charset=utf-8'/>
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    <!-- 
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      === NOTA BENE ===
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      For the three scripts below, if your spec resides on dev.w3 you can check them
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      out in the same tree and use relative links so that they'll work offline,
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     -->
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    <script src='https://www.w3.org/Tools/respec/respec-w3c-common' class='remove' async></script> 
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    <script class='remove'>
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      var respecConfig = {
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          // specification status (e.g. WD, LCWD, NOTE, etc.). If in doubt use ED.
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          specStatus:           "ED",
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          // the specification's short name, as in http://www.w3.org/TR/short-name/
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          shortName:            "ldp",
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          // if your specification has a subtitle that goes below the main
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          // formal title, define it here
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          // subtitle   :  "an excellent document",
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          // if you wish the publication date to be other than today, set this
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          publishDate:  "",
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          // if the specification's copyright date is a range of years, specify
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          // the start date here:
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          // copyrightStart: "2005"
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          // if there is a previously published draft, uncomment this and set its YYYY-MM-DD date
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          // and its maturity status
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          previousPublishDate:  "2013-07-30",
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          previousMaturity:  	"LC",
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          previousURI: 			"http://www.w3.org/TR/2013/WD-ldp-20130730/",
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          // if there a publicly available Editor's Draft, this is the link
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          edDraftURI:           "http://www.w3.org/2012/ldp/hg/ldp.html",
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          // if this is a LCWD, uncomment and set the end of its review period
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          lcEnd: "2013-09-02",
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          // Only include h1 and h2 level
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          maxTocLevel: 2,
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          // if you want to have extra CSS, append them to this list
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          // it is recommended that the respec.css stylesheet be kept
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          //extraCSS:             ["https://dvcs.w3.org/hg/ldpwg/css/respec.css"],
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          // editors, add as many as you like
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          // only "name" is required
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          editors:  [
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              { name: "Steve Speicher", url: "http://stevespeicher.blogspot.com",
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                company: "IBM Corporation", companyURL: "http://ibm.com/" },
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              { name: "John Arwe", url: "https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/allcommunities?userid=120000CAW7",
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                company: "IBM Corporation", companyURL: "http://ibm.com/" },
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			  {name: "Ashok Malhotra", url: "mailto:ashok.malhotra@oracle.com",
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			    company: "Oracle Corporation", companyURL: "http://www.oracle.com" },
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          ],
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          // authors, add as many as you like. 
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          // This is optional, uncomment if you have authors as well as editors.
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          // only "name" is required. Same format as editors.
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          //authors:  [
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          //    { name: "Your Name", url: "http://example.org/",
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          //      company: "Your Company", companyURL: "http://example.com/" },
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          //],
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          // name of the WG
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          wg:           "Linked Data Platform Working Group",
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          // URI of the public WG page
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          wgURI:        "http://www.w3.org/2012/ldp",
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          // name (without the @w3c.org) of the public mailing to which comments are due
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          wgPublicList: "public-ldp-comments",
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          // URI of the patent status for this WG, for Rec-track documents
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          // !!!! IMPORTANT !!!!
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          // This is important for Rec-track documents, do not copy a patent URI from a random
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          // document unless you know what you're doing. If in doubt ask your friendly neighbourhood
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          // Team Contact.
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          wgPatentURI:  "http://www.w3.org/2004/01/pp-impl/55082/status",
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          doRDFa: "1.1",
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			localBiblio:  {
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				"HTTPBIS-SEMANTICS": {
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					title:    "Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content"
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				,   href:     "http://tools.ietf.org/html/draft-ietf-httpbis-p2-semantics/"
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				,   authors:  [
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						"R. Fielding"
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					,   "J. Reschke"
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					]
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				,   status:   "In Last Call"
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				,   publisher:  "IETF"
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				},
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				"RFC2817": {
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					title:    "Upgrading to TLS Within HTTP/1.1"
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				,   href:     "http://tools.ietf.org/html/rfc2817"
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				,   authors:  [
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						"R. Khare"
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					,   "S. Lawrence"
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					]
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				,   status:   "Proposed Standard"
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				,   publisher:  "IETF"
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				},
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				"RFC5005": {
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					title:    "Feed Paging and Archiving"
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				,   href:     "http://tools.ietf.org/html/rfc5005"
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				,   authors:  [
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						"M. Nottingham"
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					]
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				,   status:   "Proposed Standard"
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				,   publisher:  "IETF"
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				}
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			},
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      };
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    </script>
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    <style type="text/css">
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    	div.rule {padding-top: 1em;}
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    	div.ldp-issue-open {
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	    	border-color: #E05252;
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			background: #FBE9E9;
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			padding: 0.5em;
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			margin: 1em 0;
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			position: relative;
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			clear: both;
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			border-left-width: .5em;
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			border-left-style: solid;
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    	}
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    	div.ldp-issue-pending {
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	    	border-color: #FAF602;
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			background: #F7F6BC;
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			padding: 0.5em;
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			margin: 1em 0;
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			position: relative;
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			clear: both;
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			border-left-width: .5em;
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			border-left-style: solid;
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    	}
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    	div.ldp-issue-closed {
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	    	border-color: #009900;
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			background: #BCF7CF;
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			padding: 0.5em;
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			margin: 1em 0;
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			position: relative;
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			clear: both;
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			border-left-width: .5em;
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			border-left-style: solid;
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    	}
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    	div.ldp-issue-title {
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    	    color: #E05252;
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    	    padding-right: 1em;
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            min-width: 7.5em;
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    	}
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		.atrisk {
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			padding:    1em;
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			margin: 1em 0em 0em;
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			border: 1px solid #f00;
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			background: #ffc;
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		}
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		.atrisktext {
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			/* content:    "Feature At Risk"; */
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			display:    block;
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			width:  150px;
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			margin: -1.5em 0 0.5em 0;
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			font-weight:    bold;
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			border: 1px solid #f00;
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			background: #fff;
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			padding:    3px 1em;
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		}
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		.normal { 
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			font-weight: normal;
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			font: normal 100% sans-serif;
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		}
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    </style>
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    <style type="text/css" media="all">
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    	code {
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    	    font-weight:bold;
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			font-size:larger;
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    	}
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		 /* ReSpec uses color ff4500 for code elements, which does not print well on some black & white printers
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		    and is a little hard to read for some folks even on-line. 
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			The default code font size was also somewhat too small/hard to read.
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		*/
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    </style>
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  </head>
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<body>
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<section id='abstract'>
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This document describes a set of best practices and simple approach for a read-write Linked Data architecture, based on
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HTTP access to web resources that describe their state using the <abbr title="Resource Description Framework">RDF</abbr>
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data model.
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</section>
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<section class="informative" id="intro">
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<h1>Introduction</h1>
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	<p>This specification describes the use
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	of HTTP for accessing, updating, creating and deleting resources from
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	servers that expose their resources as Linked Data.  It provides clarifications
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	and extensions of the rules of Linked Data [[LINKED-DATA]]:</p>
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	<ol>
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		<li>Use URIs as names for things</li>
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		<li>Use HTTP URIs so that people can look up those names</li>
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		<li>When someone looks up a URI, provide useful information, using the standards
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			(RDF*, <abbr title="SPARQL Protocol and RDF Query Language">SPARQL</abbr>)
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		</li>
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		<li>Include links to other URIs, so that they can discover more things</li>
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	</ol>
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	<p>This specification discusses standard HTTP and RDF techniques  
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	used when constructing clients and servers that 
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	create, read, and write <a title="Linked Data Platform Resource">Linked Data Platform Resources</a>.
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	A companion document discusses best practices that you 
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	should use, and anti-patterns you should avoid, when constructing these clients and servers.
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	</p> 
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	<p>This specification provides a widely re-usable pattern to deal with large resources.  
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	Depending on the server’s capabilities, a GET request on a <a title="Paged resource">resource</a> can
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	be redirected to a <a title="Single-page resource">subset of the resource (one page)</a>, that provides access to subsequent pages 
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	(see <a href="#ldpr-Paging" class="sectionRef"></a>). 
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	</p>
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	<p>This specification defines a special type of <a>Linked Data Platform Resource</a>: a 
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	<a title="Linked Data Platform Container">Container</a>.  Containers are very useful 
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	in building application models involving collections of resources, often homogeneous ones. 
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	For example, universities offer a collection of classes 
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	and have a collection of faculty members, each faculty member teaches a collection of courses, and so on. 
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	This specification discusses how to work with containers.  Resources can be added to containers  
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	using standard HTTP operations like 
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	POST (see <a href="#ldpc-HTTP_POST" class="sectionRef"></a>).</p>
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	<p>The intention of this specification is to enable additional rules and layered groupings of rules as 
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	additional specifications.  The scope is intentionally narrow to provide a set of key rules for 
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	reading and writing Linked Data that most, if not all, other specifications will depend upon and 
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	implementations will support.</p>
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	<p>For context and background, it could be useful to read <a href="#bib-LDP-UCR">Linked Data Platform Use Case and Requirements</a> [[LDP-UCR]] 
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	and <a href="#base-specs" class="sectionRef"></a>.</p>
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</section>
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<section id="terms">
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<h1>Terminology</h1>
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<p>Terminology is based on W3C's Architecture of the World Wide Web [[WEBARCH]] and Hyper-text Transfer Protocol [[HTTP11]].
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</p>
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  <dl class="glossary">
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	<dt>Link</dt>
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	<dd>A relationship between two resources when one resource (representation) refers to the other resource by means
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		of a URI [[WEBARCH]].
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		<p></p></dd>
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	<dt>Linked Data</dt>
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	<dd>As defined by Tim Berners-Lee [[LINKED-DATA]].<p></p></dd>
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	<dt>Client</dt>
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	<dd>A program that establishes connections for the purpose of sending requests [[HTTP11]].<p></p></dd>
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	<dt>Server</dt>
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	<dd>An application
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		program that accepts connections in order to service requests by
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		sending back responses. 
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		<p>Any given program may be capable of being
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		both a client and a server; our use of these terms refers only to
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		the role being performed by the program for a particular
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		connection, rather than to the program's capabilities in general.
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		Likewise, any server may act as an origin server, proxy, gateway,
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		or tunnel, switching behavior based on the nature of each request
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		[[HTTP11]]. </p></dd>
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	<dt><dfn>Linked Data Platform Resource</dfn> (<abbr title="Linked Data Platform Resource">LDPR</abbr>)</dt>
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	<dd>A HTTP resource whose state is represented in any way that conforms to the simple lifecycle
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		patterns and conventions in <a href="#ldpr" class="sectionRef"></a>.<p></p></dd>
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	<dt><dfn>Linked Data Platform RDF Resource</dfn> (<abbr title="Linked Data Platform RDF Resource">LDP-RR</abbr>)</dt>
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	<dd>An <a title="Linked Data Platform Resource">LDPR</a> whose state is represented in RDF, corresponding to
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	an RDF <a href="http://www.w3.org/TR/rdf11-concepts/#dfn-named-graph">named graph</a> [[rdf11-concepts]].
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	<p></p></dd>	
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	<dt><dfn>Linked Data Platform Binary Resource</dfn> (<abbr title="Linked Data Platform Binary Resource">LDP-BR</abbr>)</dt>
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	<dd>A <a title="Linked Data Platform Resource">LDPR</a> whose state is <em>not</em> represented in RDF.
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	These are binary or text documents that do not have useful RDF representations.
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	<p></p></dd>
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	<dt><dfn>Linked Data Platform Container</dfn> (<abbr title="Linked Data Platform Container">LDPC</abbr>)</dt>
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	<dd>An LDPR representing a collection of <a title="Membership">member</a> resources and/or <a title="Containment">contained</a>
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	documents (information resources [[!WEBARCH]])
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	that responds to client requests for creation, modification, and/or enumeration of its members and documents, 
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	and that conforms to the simple lifecycle
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	patterns and conventions in <a href="#ldpc" class="sectionRef"></a>.
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	<p></p></dd>
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	<dt><dfn>Linked Data Platform Basic Container</dfn> (<abbr title="Linked Data Platform Basic Container">LDP-BC</abbr>)</dt>
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	<dd>A <a title="Linked Data Platform Container">LDPC</a> that uses a single pre-defined predicate to link to both
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	its <a title="Containment">contained</a> and <a title="Membership">member</a> documents (information resources) [[!WEBARCH]].
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	<p></p></dd>
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	<dt><dfn>Linked Data Platform Direct Container</dfn> (<abbr title="Linked Data Platform Direct Container">LDP-DC</abbr>)</dt>
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	<dd>A <a title="Linked Data Platform Container">LDPC</a> that has the flexibility of choosing what form its 
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	<a title="Membership triples">membership triples</a> take, and allows <a title="Membership">members</a> to be 
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	any resources [[!WEBARCH]], not only documents.
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	<p></p></dd>
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	<dt><dfn>Linked Data Platform Indirect Container</dfn> (<abbr title="Linked Data Platform Indirect Container">LDP-IC</abbr>)</dt>
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	<dd>A <a title="Linked Data Platform Container">LDPC</a> that is similar to a <a title="Linked Data Platform Direct Container">LDP-DC</a>
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	and is capable of accepting creation requests that result in <a title="Membership">members</a> being added based
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	on the content of its <a title="Containment">contained</a> documents rather than the URIs assigned to those documents.
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	<p></p></dd>
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	<dt><dfn>Membership</dfn></dt>
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	<dd>The relationship linking an LDP-RR (LDPCs are also LDP-RRs) and its member LDPRs.  
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	There often is a linked LDPC that assists with managing the member LDPRs.<p></p></dd>
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	<dt><dfn>Membership triples</dfn></dt>
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	<dd>A set of triples in an LDPC's state that lists its members.
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		A container's membership triples all have one of the following patterns:
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		<table style="margin-left: +3em">
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		<tr>
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		<td style="padding:0 0 0 +2ex"> <var style="background:#DDDDDD">membership-constant-URI</var> </td>
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		<td style="padding:0 0 0 +2ex"> <var>membership-predicate</var> </td>
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		<td style="padding:0 0 0 +2ex"> <var style="background:#CCFFFF">member-derived-URI</var> </td>
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		</tr>
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		<tr>
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		<td style="padding:0 0 0 +2ex"> <var style="background:#CCFFFF">member-derived-URI</var> </td>
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		<td style="padding:0 0 0 +2ex"> <var>membership-predicate</var> </td>
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		<td style="padding:0 0 0 +2ex"> <var style="background:#DDDDDD">membership-constant-URI</var> </td>
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		</tr>
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		</table>
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		The difference between the two is simply which position member-derived-URI occupies, which is usually
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		driven by the choice of <var>membership-predicate</var>.  Most predicates have a natural forward direction
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		inherent in their name, and existing vocabularies contain useful examples that read naturally in
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		each direction.  <code>ldp:member</code> and <code>dcterms:isPartOf</code> are representative examples.
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		<p>
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		Each container exposes properties (see <a href="#ldpc-general" class="sectionRef"></a>)
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		that allow clients to determine which pattern it
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		uses, what the actual <var>membership-predicate</var> and <var>membership-constant-URI</var> values are, 
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		and (for containers that allow the creation of new members) what value is used
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		for the <var>member-derived-URI</var> based on the client's input to the 
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		creation process.</p>
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	<p></p></dd>
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	<dt><dfn>Membership predicate</dfn></dt>
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	<dd>The predicate of all a LDPC's <a title="Membership triples">membership triples</a>.
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	<p></p></dd>
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	<dt><dfn>Containment</dfn></dt>
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	<dd>The relationship binding an LDPC to LDPRs whose lifecycle it controls and is aware of.  The
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	lifecycle of the contained LDPR is limited by the lifecycle of the containing LDPC;
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	that is, a contained LDPR cannot be created (through LDP-defined means) before its containing LDPC exists.
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	<p></p></dd>
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	<dt><dfn>Containment triples</dfn></dt>
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	<dd>
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	A set of triples in an LDPC's state, maintained by the LDPC, that lists documents created by the LDPC but not yet deleted.
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	These triples <strong>always</strong> have the form: <var>( LDPC URI, ldp:contains , document-URI )</var>.
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	<p></p></dd>
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	<dt><dfn>Non-member resource</dfn></dt>
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	<dd>A HTTP resource associated with a LDPC by a server for the purpose of enabling clients to
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	retrieve a subset of the LDPC's state, namely the subset that omits the LDPC's membership triples.
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	In other words, the union of the non-member resource's state and the LDPC's membership triples
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	exactly equals the LDPC's state.
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   381
	<p></p></dd>
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   382
	
395
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   383
	<dt><dfn>Paged resource</dfn></dt>
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
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diff changeset
   384
	<dd>A LDP-RR whose representation may be too large to fit in a single HTTP response, for which an
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
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diff changeset
   385
	LDP server offers a sequence of single-page <a title="Linked Data Platform RDF Resource">LDP-RRs</a>.  
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
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diff changeset
   386
	When the representations of the sequence's resources
412
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   387
	are combined by a client, the client has a (potentially incomplete or incoherent) copy of the paged resource's
464
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diff changeset
   388
	state.  If a paged resource <var>P</var> is a LDP-RR and is broken into a sequence of pages
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
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diff changeset
   389
	(single-page resources) <var>P<sub>1</sub>, P<sub>2</sub>, ...,P<sub>n</sub></var>,
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   390
	the representation of each <var>P<sub>i</sub></var> contains
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
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diff changeset
   391
	a subset of the triples in <var>P</var>.
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
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diff changeset
   392
	LDP allows paging of resources other than <a title="Linked Data Platform RDF Resource">LDP-RRs</a>, 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
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diff changeset
   393
	but does not specify how clients combine
412
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diff changeset
   394
	their representations.  See <a href="#ldpr-Paging" class="sectionRef"></a> for additional details.  For readers
415
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diff changeset
   395
	familiar with paged feeds [[RFC5005]], a paged resource is similar to a logical feed.
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
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diff changeset
   396
	Any resource could be considered to be a paged resource consisting of exactly one page, 
412
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diff changeset
   397
	although there is no known advantage in doing so.
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
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diff changeset
   398
	<p></p></dd>
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diff changeset
   399
	
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
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   400
	<dt><dfn>Single-page resource</dfn></dt>
464
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diff changeset
   401
	<dd>One of a sequence of related <a title="Linked Data Platform RDF Resource">LDP-RRs</a>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
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diff changeset
   402
	<var>P<sub>1</sub>, P<sub>2</sub>, ...,P<sub>n</sub></var>, 
395
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diff changeset
   403
	each of which contains a subset of the state
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
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diff changeset
   404
	of another resource <var>P</var>.  <var>P</var> is called the paged resource.
412
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diff changeset
   405
	For readers
415
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diff changeset
   406
	familiar with paged feeds [[RFC5005]], a single-page resource is similar to a feed document and the same
412
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   407
	coherency/completeness considerations apply.
413
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parents: 412
diff changeset
   408
	<a href="#ldpr-pagingGET-sequences-change">LDP provides no guarantees that the sequence is stable</a>.
416
166375df8bf8 Various editorial and validation fixes
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parents: 415
diff changeset
   409
	<p>
395
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diff changeset
   410
	Note: the choice of terms was designed to help authors and readers clearly differentiate between
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
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parents: 393
diff changeset
   411
	the <a title="Paged resource"><em>resource being paged</em></a>, and the 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
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diff changeset
   412
	<a title="Single-page resource"><em>individual page resources</em></a>, 
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   413
	in cases where both are mentioned in
413
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diff changeset
   414
	close proximity.  
225
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   415
	<p></p></dd>
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   416
	
412
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   417
	<dt><dfn>first page link</dfn></dt>
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diff changeset
   418
	<dd>A link to the first <a title="Single-page resource">single-page resource</a>
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diff changeset
   419
	of a <a title="Paged resource">paged resource</a> <var>P</var>.  Syntactically, a
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diff changeset
   420
	HTTP <code>Link &lt;<var>P<sub>1</sub></var>&gt;; rel='first'</code>
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diff changeset
   421
	header [[!RFC5988]].
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diff changeset
   422
	<p></p></dd>
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diff changeset
   423
	
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   424
	<dt><dfn>next page link</dfn></dt>
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diff changeset
   425
	<dd>A link to the next <a title="Single-page resource">single-page resource</a> 
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parents: 410
diff changeset
   426
	of a <a title="Paged resource">paged resource</a> <var>P</var>.  Syntactically, a
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
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parents: 410
diff changeset
   427
	HTTP <code>Link &lt;<var>P<sub>i</sub></var>&gt;; rel='next'</code>
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parents: 414
diff changeset
   428
	header [[!RFC5988]] where the target URI is <var>P<sub>i=2...n</sub></var>.
412
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parents: 410
diff changeset
   429
	<p></p></dd>
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diff changeset
   430
	
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   431
	<dt><dfn>last page link</dfn></dt>
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diff changeset
   432
	<dd>A link to the last <a title="Single-page resource">single-page resource</a>
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diff changeset
   433
	of a <a title="Paged resource">paged resource</a> <var>P</var>.  Syntactically, a
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diff changeset
   434
	HTTP <code>Link &lt;<var>P<sub>n</sub></var>&gt;; rel='last'</code>
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   435
	header [[!RFC5988]].
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diff changeset
   436
	<p></p></dd>
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diff changeset
   437
	
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   438
	<dt><dfn>previous page link</dfn></dt>
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diff changeset
   439
	<dd>A link to the previous <a title="Single-page resource">single-page resource</a> 
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diff changeset
   440
	of a <a title="Paged resource">paged resource</a> <var>P</var>.  Syntactically, a
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diff changeset
   441
	HTTP <code>Link &lt;<var>P<sub>i</sub></var>&gt;; rel='prev'</code>
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diff changeset
   442
	header [[!RFC5988]] where the target URI is <var>P<sub>i=1...n-1</sub></var>.
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3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
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   443
	<p></p></dd>
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   444
	
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  </dl>
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   446
333
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   447
<section id="conventions">
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   448
<h2>Conventions Used in This Document</h2>
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   449
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   450
	<p>Sample resource representations are provided in <code>text/turtle</code>
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   451
		format [[TURTLE]].</p>
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   452
	<p>Commonly used namespace prefixes:</p>
93
598be81efe5f Expanded on wording for 4.3 to be more consistent
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   453
	<pre style="word-wrap: break-word; white-space: pre-wrap;">	@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
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diff changeset
   454
	@prefix foaf:     &lt;http://xmlns.com/foaf/0.1/&gt;.
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   455
	@prefix rdf:     &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt;.
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2aeef316040a ISSUE-25 made changes for composition model
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   456
	@prefix ldp:     &lt;http://www.w3.org/ns/ldp#&gt;.
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   457
	@prefix xsd:     &lt;http://www.w3.org/2001/XMLSchema#&gt;.</pre>
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   458
</section>
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   459
</section>
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   460
    
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   461
<section id='conformance'>
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diff changeset
   462
373
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
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   463
<p>LDP uses the term <b><dfn>informative</dfn></b> as a synonym for non-normative.</p>
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   464
<p>The status of the sections of Linked Data Platform 1.0 (this document) is as follows:</p>
71
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diff changeset
   465
<ul>
463
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diff changeset
   466
  <li>1. Introduction: <b>non-normative</b></li>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
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   467
  <li>2. Terminology: <b>normative</b></li>
71
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   468
  <li>3. Conformance: <b>normative</b></li>
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   469
  <li>4. Linked Data Platform Resources: <b>normative</b></li>
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diff changeset
   470
  <li>5. Linked Data Platform Containers: <b>normative</b></li>
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b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
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   471
  <li>6. HTTP Header Definitions: <b>normative</b></li>
463
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   472
  <li>A. Acknowledgements: <b>non-normative</b></li> 
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992015a0d3cd Setting all LC status items for prep for publication
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   473
  <li>B.1 Normative references: <b>normative</b></li>
463
ae72388dbb82 start action-127 paging use of [23]xx response code; also changed 'informative' to 'non-normative' so sandro is happy[ier]
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diff changeset
   474
  <li>B.2 Non-normative references: <b>non-normative</b></li>
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   475
</ul>
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   476
447
f7f6d5fe3313 Fix up conformance section to use new LDP client section
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   477
<p>A conforming <b><dfn>LDP client</dfn></b> is a conforming HTTP client [[!HTTP11]] that follows the rules defined by LDP in
372
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   478
<a href="#ldpclient" class="sectionRef"></a>.
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   479
</p>
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diff changeset
   480
447
f7f6d5fe3313 Fix up conformance section to use new LDP client section
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   481
<p>A conforming <b><dfn>LDP server</dfn></b> is a conforming HTTP server [[!HTTP11]] that follows the rules defined by LDP in 
372
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   482
<a href="#ldpr" class="sectionRef"></a> when it is serving LDPRs, and also
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   483
<a href="#ldpc" class="sectionRef"></a> when it is serving LDPCs.
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   484
LDP does not constrain its behavior when serving other HTTP resources.
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   485
</p>
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   486
</section>
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diff changeset
   487
435
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   488
<section id="ldpclient">
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diff changeset
   489
<h1>Linked Data Platform Clients</h1>
438
5fc5b459c993 Removed redudant reqs that have been moved to 4. Linked Data Platform Clients
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diff changeset
   490
<p>All of the following are conformance rules for <a title="LDP server">LDP Clients</a>.
435
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diff changeset
   491
</p>
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   492
<section><h2>General</h2>
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   493
	<section id="ldp-cli-multitype"><h2 class="normal">In the absence of special knowledge of the application or domain, 
466
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   494
		<a title="LDP client">LDP clients</a> MUST assume that any LDP-RR can have multiple values for <code>rdf:type</code>.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   495
	</h2></section> <!-- Was 4.3.5 / #ldpr-4_3_5 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   496
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   497
	<section id="ldpr-cli-typeschange"><h2 class="normal">In the absence of special knowledge of the application or domain, 
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   498
		<a title="LDP client">LDP clients</a> MUST assume that the <code>rdf:type</code> values
466
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   499
		of a given LDP-RR can change over time.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   500
	</h2></section> <!-- Was 4.3.6 / #ldpr-4_3_6 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   501
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   502
	<section id="ldpr-cli-openpreds"><h2 class="normal"><a title="LDP client">LDP clients</a> SHOULD always assume that the set of predicates for a
466
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   503
		LDP-RR of a particular type at an arbitrary server is open, in the
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   504
		sense that different resources of the same type may not all have the
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   505
		same set of predicates in their triples, and the set of predicates that
466
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   506
		are used in the state of any one LDP-RR is not limited to any pre-defined
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   507
		set.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   508
	</h2></section> <!-- Was 4.5.3 / #ldpr-ldpr-4_5_3 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   509
	
466
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   510
	<section id="ldpr-cli-preservetriples"><h2 class="normal">
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   511
		A <a title="LDP client">LDP client</a> MUST preserve all triples retrieved from an LDP-RR using HTTP <code>GET</code> that
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   512
		it doesn’t change whether it understands the predicates or not, when
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   513
		its intent is to perform an update using HTTP <code>PUT</code>.  The use of HTTP
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   514
		<code>PATCH</code> instead of HTTP <code>PUT</code> for update avoids this burden for clients
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   515
		[[RFC5789]].
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   516
	</h2></section> <!-- Was 4.5.5 / #ldpr-ldpr-4_5_5 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   517
</section>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   518
</section> <!-- Client constraints -->
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   519
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   520
<section id="ldpr">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   521
<h1>Linked Data Platform Resources</h1>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   522
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   523
<section class="informative" id="ldpr-informative">
466
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   524
<h2>Introduction</h2>
33
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   525
	<p>Linked Data Platform Resources (<dfn><abbr title="Linked Data Platform Resources">LDPRs</abbr></dfn>) are HTTP resources
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   526
		that conform to the simple patterns and conventions in this section.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   527
		HTTP requests to access, modify, create or delete LDPRs are accepted
372
d85ca5c8cb68 Preparing for profiles - conformance section updates; add link to IETF draft
John Arwe
parents: 370
diff changeset
   528
		and processed by <a title="LDP server">LDP servers</a>. Most LDPRs are domain-specific resources
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   529
		that contain data for an entity in some domain, which could be
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   530
		commercial, governmental, scientific, religious, or other.</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   531
	<p>Some of the rules defined in this document provide
33
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   532
		clarification and refinement of the base Linked Data rules [[LINKED-DATA]];
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   533
		others address additional needs.</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   534
	<p>The rules for Linked Data Platform Resources address basic
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   535
		questions such as:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   536
	<ul>
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
   537
		<li>What resource representations should be used?</li>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   538
		<li>How is optimistic collision detection handled for updates?</li>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   539
		<li>What should client expectations be for changes to linked-to resources,
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   540
				such as type changes?</li>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   541
		<li>What can servers do to ease the burden of constraints for resource
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   542
				creation?</li>
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   543
		<li>How	do I GET the representation of a large resource broken up into pages?</li>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   544
	</ul>
463
ae72388dbb82 start action-127 paging use of [23]xx response code; also changed 'informative' to 'non-normative' so sandro is happy[ier]
John Arwe
parents: 462
diff changeset
   545
	<p>Additional non-normative guidance is available in the <a
439
28beff0a4f89 Updated reference to LDP BPG editor's draft and added ref to LDP-UCR
sspeiche
parents: 438
diff changeset
   546
			href="https://dvcs.w3.org/hg/ldpwg/raw-file/default/ldp-bp/ldp-bp.html"
28beff0a4f89 Updated reference to LDP BPG editor's draft and added ref to LDP-UCR
sspeiche
parents: 438
diff changeset
   547
			class="external"
28beff0a4f89 Updated reference to LDP BPG editor's draft and added ref to LDP-UCR
sspeiche
parents: 438
diff changeset
   548
			title="LDP Best Practices and Guidelines"
28beff0a4f89 Updated reference to LDP BPG editor's draft and added ref to LDP-UCR
sspeiche
parents: 438
diff changeset
   549
			rel="nofollow">LDP Best Practices and Guidelines editor's draft</a> that addresses
37
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   550
		questions such as:</p>
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   551
	<ul>
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   552
		<li>What literal value types should be used?</li>
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   553
		<li>Are there some typical vocabularies that should be reused?</li>
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   554
	</ul>
373
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
   555
	<p>The following sections define the conformance rules for LDP servers when serving LDPRs.
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   556
		This document also explains <a href="#ldpr-Paging">how a server paginates an LDP-RR's representation</a> if it gets too big.
463
ae72388dbb82 start action-127 paging use of [23]xx response code; also changed 'informative' to 'non-normative' so sandro is happy[ier]
John Arwe
parents: 462
diff changeset
   557
		Companion non-normative documents describe additional guidelines for use when interacting with LDPRs. 
373
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
   558
	</p>
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   559
	<p>An LDP server manages two kinds of <a title="Linked Data Platform Resources">LDPRs</a>, those resources who whose state 
461
64c0ca32c9e6 Cleanup from Action-123 add LDPR-RR and LDPR-BR
John Arwe
parents: 460
diff changeset
   560
	is represented using RDF (LDP-RR) and those using other formats (LDP-BR).  LDP-RRs have the unique
64c0ca32c9e6 Cleanup from Action-123 add LDPR-RR and LDPR-BR
John Arwe
parents: 460
diff changeset
   561
	quality that their representation is based on RDF, which addresses a number of use cases from web metadata, open data 
64c0ca32c9e6 Cleanup from Action-123 add LDPR-RR and LDPR-BR
John Arwe
parents: 460
diff changeset
   562
	models, machine processable information, and automated processing by software agents [[!RDF-CONCEPTS]].  LDP-BRs are almost anything
64c0ca32c9e6 Cleanup from Action-123 add LDPR-RR and LDPR-BR
John Arwe
parents: 460
diff changeset
   563
	on the Web today: images, HTML pages, word processing documents, spreadsheets, etc. and LDP-RRs hold 
64c0ca32c9e6 Cleanup from Action-123 add LDPR-RR and LDPR-BR
John Arwe
parents: 460
diff changeset
   564
	metadata associated with LDP-BRs in some cases.
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   565
	</p>
451
f68e4a59fba1 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 450
diff changeset
   566
    <figure id="fig-ldpr-types">
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   567
        <img src="images/ldpr1.png" alt="Sample separation of Linked Data Platform Resource" />
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   568
        <figcaption>Samples of different types of LDPRs</figcaption>
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   569
    </figure>
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   570
    <p>The LDP-BRs and LDP-RRs are simply sub-types of LDPRs, as illustrated in <a href="#fig-ldpr-class"></a>.</p>  
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   571
    <figure id="fig-ldpr-class">
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   572
       <img src="images/ldpr2.png" alt="Class Diagram of Linked Data Platform Resource" />
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   573
       <figcaption>Class relationship of types of LDPRs</figcaption>
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   574
     </figure>
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   575
	
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   576
</section>
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   577
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   578
<section id="ldpr-general">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   579
<h2>General</h2>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   580
		
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   581
	<section id="ldpr-gen-http"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST at least be HTTP/1.1 conformant servers [[!HTTP11]].
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   582
	</h2></section><!-- Was 4.2.1 / #ldpr-4_2_1 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   583
	
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   584
	<section id="ldpr-gen-rdf"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST provide an RDF representation for <a title="Linked Data Platform RDF Resource">LDP-RRs</a>. 
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   585
	The HTTP <code>Request-URI</code> of the LDP-RR is typically the subject of most triples in the response.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   586
	</h2></section><!-- Was 4.2.2 / #ldpr-4_2_2 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   587
	
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   588
	<section id="ldpr-gen-binary"><h2 class="normal"><a title="LDP server">LDP servers</a> MAY host a mixture of LDPRs, <a title="Linked Data Platform RDF Resource">LDP-RRs</a>
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   589
	and <a title="Linked Data Platform Binary Resource">LDP-BRs</a>. For example, it
372
d85ca5c8cb68 Preparing for profiles - conformance section updates; add link to IETF draft
John Arwe
parents: 370
diff changeset
   590
		is common for <a title="LDP server">LDP servers</a> to need to host binary or text resources
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   591
		that do not have useful RDF representations.</h2></section><!-- Was 4.2.3 / #ldpr-4_2_3 -->
69
0f9825dea52b Updating some simple formatting, reorganizing open issues and todos
sspeiche
parents: 68
diff changeset
   592
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   593
	<section id="ldpr-gen-reusevocab"><h2 class="normal"><a title="Linked Data Platform RDF Resource">LDP-RRs</a> SHOULD reuse existing vocabularies instead of creating
33
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   594
		their own duplicate vocabulary terms.  In addition to this general rule, some specific cases are
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   595
		covered by other conformance rules.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   596
	</h2></section><!-- Was 4.2.4 / #ldpr-4_2_4 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   597
	
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   598
	<section id="ldpr-gen-reusevocabsuchas"><h2 class="normal"><a title="Linked Data Platform RDF Resource">LDP-RRs</a> predicates SHOULD use standard vocabularies such as Dublin Core
188
8eaaca309617 Various editorial clean up items from editor todo list
sspeiche
parents: 187
diff changeset
   599
		[[!DC-TERMS]], RDF [[!RDF-CONCEPTS]] and RDF Schema [[!RDF-SCHEMA]], whenever
33
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   600
		possible.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   601
	</h2></section><!-- Was 4.2.4.1 / #ldpr-4_2_4_1 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   602
	
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   603
	<section id="ldpr-gen-atleast1rdftype"><h2 class="normal"><a title="Linked Data Platform RDF Resource">LDP-RRs</a> representations SHOULD have at least one <code>rdf:type</code>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   604
		set explicitly.  This makes the representations much more useful to
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   605
		client applications that don’t support inferencing.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   606
	</h2></section><!-- Was 4.2.5 / #ldpr-4_2_5 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   607
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   608
	<section id="ldpr-gen-etags"><h2 class="normal"><a title="LDP server">LDP server</a> responses MUST use entity tags (either 
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   609
		weak or strong ones) as response <code>ETag</code> header values.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   610
	</h2></section><!-- Was 4.2.8 / #ldpr-4_2_8 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   611
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   612
	<section id="ldpr-gen-linktypehdr"><h2 class="normal"><a title="LDP server">LDP servers</a>
434
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   613
		exposing LDPRs 
149
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   614
		MUST advertise their LDP support by exposing a HTTP <code>Link</code> header
454
4a28a15ee8fd ACTION-120 (complete) Updated LDPC general, GET and POST sections
sspeiche
parents: 453
diff changeset
   615
		with a target URI of <code>http://www.w3.org/ns/ldp#Resource</code>, and
402
935e1e08d2bb Fix some typos around paging, move to single quotes for link relations per 5988
John Arwe
parents: 395
diff changeset
   616
		a link relation type of <code>type</code> (that is, <code>rel='type'</code>)
149
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   617
		in all responses to requests made 
434
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   618
		to the LDPR's HTTP <code>Request-URI</code>. 
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   619
	</h2></section><!-- Was 4.2.10 / #ldpr-4_2_10 -->
454
4a28a15ee8fd ACTION-120 (complete) Updated LDPC general, GET and POST sections
sspeiche
parents: 453
diff changeset
   620
	
4a28a15ee8fd ACTION-120 (complete) Updated LDPC general, GET and POST sections
sspeiche
parents: 453
diff changeset
   621
	<!-- TODO: Is this RDFResource or just Resource?  Language gets odd in section #ldpc-post-createrdf , where it says "then the server MUST create
4a28a15ee8fd ACTION-120 (complete) Updated LDPC general, GET and POST sections
sspeiche
parents: 453
diff changeset
   622
	an LDPR".  If client sent a JPEG and type=#RDFResource, what should the server do?  If the more generic #Resource, seems to catch
4a28a15ee8fd ACTION-120 (complete) Updated LDPC general, GET and POST sections
sspeiche
parents: 453
diff changeset
   623
	what is intended -->
434
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   624
	<blockquote>
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   625
		<p>
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   626
		Note: 
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   627
		The HTTP <code>Link</code> header is the method by which servers assert their support for the LDP specification 
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   628
		on a specific resource in a way that clients can inspect dynamically at run-time.   
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   629
		This is <strong>not</strong> equivalent to the
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   630
		presence of a <var>(subject-URI, <code>rdf:type</code>, <code>ldp:Resource</code>)</var> triple in an RDF resource.
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   631
		The presence of this header asserts that the server complies with the LDP specification's constraints on 
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   632
		HTTP interactions with LDPRs, that is
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   633
		it asserts that the resource <a href="#ldpr-gen-tags">has Etags</a>, <a href="#ldpr-gen-rdf">has an RDF representation</a>, and so on,
434
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   634
		which is not true of all Web resources served as RDF media types.
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   635
		</p>
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   636
		<p>
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   637
		Note: 
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   638
		<a href="#ldpr-gen-binary">A LDP server can host a mixture of LDPRs and other resources</a>, and therefore there is no implication
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   639
		that LDP support advertised on one HTTP <code>Request-URI</code> means that other 
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   640
		resources on the same server are also LDPRs.  Each HTTP <code>Request-URI</code> needs to be 
434
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   641
		individually inspected, in the absence of outside information.
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   642
		</p>
83b656184387 Action-122 close ISSUE-91, by adding that for an LDPC the link header is type=LDPC
John Arwe
parents: 433
diff changeset
   643
	</blockquote>
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   644
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   645
	<section id="ldpr-gen-noinferencing"><h2 class="normal"><a title="LDP server">LDP servers</a>
152
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   646
		MUST NOT require LDP clients to implement inferencing in order to recognize the subset
215
da72115eb40b Various updates per review of Raul
sspeiche
parents: 213
diff changeset
   647
		of content defined by LDP.  Other specifications built on top of LDP may require clients
188
8eaaca309617 Various editorial clean up items from editor todo list
sspeiche
parents: 187
diff changeset
   648
		to implement inferencing [[!RDF-CONCEPTS]].  The practical implication is that all content defined by LDP
152
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   649
		must be explicitly represented. 
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   650
	</h2></section><!-- Was 4.2.11 / #ldpr-4_2_11 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   651
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   652
	<section id="ldpr-gen-defbaseuri"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST assign the default 
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   653
		base-URI for [[!RFC3987]] relative-URI resolution to be the HTTP 
224
39ca65760446 Removed 5.4.8.1 and added 4.2.12 to better handle base/rel URI
sspeiche
parents: 223
diff changeset
   654
		<code>Request-URI</code> when the resource already exists, and to the URI of the created resource when the request results 
39ca65760446 Removed 5.4.8.1 and added 4.2.12 to better handle base/rel URI
sspeiche
parents: 223
diff changeset
   655
		in the creation of a new resource.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   656
	</h2></section><!-- Was 4.2.12 / #ldpr-4_2_12 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   657
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   658
	<section id="ldpr-gen-pubclireqs"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST 
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   659
		publish any constraints on <a title="LDP client">LDP clients’</a> ability to 
402
935e1e08d2bb Fix some typos around paging, move to single quotes for link relations per 5988
John Arwe
parents: 395
diff changeset
   660
		create or update LDPRs, by adding a Link header with <code>rel='describedby'</code> 
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   661
		[[!POWDER-DR]] to all responses to requests which fail due to violation of 
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   662
		those constraints.  For example, a server that refuses resource creation 
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   663
		requests via HTTP PUT, POST, or PATCH would return this <code>Link</code> header on its 
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   664
		4xx responses to such requests.
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   665
		The same <code>Link</code> header MAY be provided on other responses.  LDP neither 
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   666
		defines nor constrains the representation of the link's target resource; 
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   667
		as stated in [[POWDER-DR]], the target might (or might not) be a POWDER 
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   668
		document.  Natural language constraint documents are therefore permitted, 
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   669
		although machine-readable ones facilitate better client interactions.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   670
	</h2></section><!-- Was 4.2.13 / #ldpr-4_2_13 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   671
	
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   672
	<section id="ldpr-page-large"><h2 class="normal"><a title="LDP server">LDP servers</a> SHOULD allow clients to retrieve large LDP-RRs in
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   673
		pages.
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   674
		See <a href="#ldpr-Paging" class="sectionRef"></a> for additional requirements associated with <a title="Paged resource">paged resources</a>.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   675
	</h2></section><!-- Was 4.2.14 / #ldpr-4_2_14 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   676
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   677
	<section id="ldpr-split-any"><h2 class="normal"><a title="LDP server">LDP servers</a> MAY 
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   678
		treat any resource (LDP-RR or not) as a <a title="Paged resource">paged resource</a>. 
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   679
		See <a href="#ldpr-Paging" class="sectionRef"></a> for additional details.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   680
	</h2></section><!-- Was 4.2.15 / #ldpr-4_2_15 -->
152
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   681
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   682
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   683
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   684
<section id="ldpr-HTTP_GET">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   685
<h2>HTTP GET</h2>
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   686
	<section id="ldpr-get-must"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST support the HTTP <code>GET</code> Method for LDPRs.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   687
	</h2></section><!-- Was 4.3.1 / #ldpr-4_3_1 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   688
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   689
	<section id="ldpr-get-options"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST support the HTTP response headers defined in 
228
ec118c66c122 Moved 4.7.2 (from HEAD) to 4.3.2 (GET), shifted rest of GET section by one
sspeiche
parents: 227
diff changeset
   690
		<a href="#ldpr-HTTP_OPTIONS" class="sectionRef"></a>.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   691
	</h2></section><!-- Was 4.3.2 / #ldpr-4_3_2 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   692
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   693
	<section id="ldpr-get-turtle"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST provide a <code>text/turtle</code>
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   694
		representation of the requested <a title="Linked Data Platform RDF Resource">LDP-RR</a> [[!TURTLE]].
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   695
	</h2></section><!-- Was 4.3.3 / #ldpr-4_3_3 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   696
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   697
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   698
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   699
<section id="ldpr-HTTP_POST">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   700
<h2>HTTP POST</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   701
	<p>This specification adds no new requirements on HTTP <code>POST</code> for LDPRs 
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   702
		even when the LDPR supports that method.  This specification does not impose any
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   703
		new requirement to support that method, and [[!HTTP11]] makes it optional.
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   704
	</p>
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   705
	<p>Clients can create LDPRs via <code>POST</code> (<a href="#ldpc-HTTP_POST" class="sectionRef"></a>) or
215
da72115eb40b Various updates per review of Raul
sspeiche
parents: 213
diff changeset
   706
		<code>PUT</code> (<a href="#ldpc-HTTP_PUT" class="sectionRef"></a>) to a LDPC, see those 
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   707
		sections for more details.  Any server-imposed constraints on LDPR creation or update  
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   708
		<a href="#ldpr-gen-pubclireqs">must be advertised</a> to clients.
417
a7cdde712c1f Updated editor TODOs and a minor editorial updates
sspeiche
parents: 416
diff changeset
   709
	<!-- TODO: movethis content into an intro/overview section and add PATCH. -->
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   710
	</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   711
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   712
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   713
<section id="ldpr-HTTP_PUT">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   714
<h2>HTTP PUT</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   715
	<p>This specification imposes the following new requirements on HTTP <code>PUT</code> for LDPRs 
37
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   716
		only when the LDPR supports that method.  This specification does not impose any
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   717
		new requirement to support that method, and [[!HTTP11]] makes it optional.
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   718
		Any server-imposed constraints on LDPR creation or update  
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   719
		<a href="#ldpr-gen-pubclireqs">must be advertised</a> to clients.
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   720
	</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   721
		
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   722
	<section id="ldpr-put-replaceall"><h2 class="normal">If a HTTP <code>PUT</code> is accepted on an existing resource, 
389
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   723
		<a title="LDP server">LDP servers</a> MUST
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   724
		replace the entire persistent state of the identified resource with
61
2f8a2d58e65c ISSUE-11 - 4.4.1 Relaxed the MUST ignore dc:modified/creator to MAY
sspeiche
parents: 60
diff changeset
   725
		the entity representation in the body of the request. 
372
d85ca5c8cb68 Preparing for profiles - conformance section updates; add link to IETF draft
John Arwe
parents: 370
diff changeset
   726
		<a title="LDP server">LDP servers</a> MAY ignore server managed properties such as <code>dcterms:modified</code> 
61
2f8a2d58e65c ISSUE-11 - 4.4.1 Relaxed the MUST ignore dc:modified/creator to MAY
sspeiche
parents: 60
diff changeset
   727
		and <code>dcterms:creator</code> if they are not under
372
d85ca5c8cb68 Preparing for profiles - conformance section updates; add link to IETF draft
John Arwe
parents: 370
diff changeset
   728
		client control. Any <a title="LDP server">LDP servers</a> that wish
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   729
		to support a more sophisticated merge of data provided by the client
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   730
		with existing state stored on the server for a resource MUST use HTTP
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   731
		<code>PATCH</code>, not HTTP <code>PUT</code>.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   732
	</h2></section><!-- Was 4.5.1 / #ldpr-4_5_1 -->
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   733
		
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   734
	<section id="ldpr-put-servermanagedprops"><h2 class="normal">
389
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   735
		If an otherwise valid HTTP <code>PUT</code> request is received 
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   736
		that attempts to change triples the server does not allow clients to modify, 
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   737
		<a title="LDP server">LDP servers</a> MUST 
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   738
		respond with a 4xx range status code (typically
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   739
		409 Conflict). 
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   740
		<a title="LDP server">LDP servers</a> SHOULD provide a corresponding response body containing
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   741
		information about which triples could not be
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   742
		persisted.
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   743
		The format of the 4xx response body is not constrained by LDP.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   744
	</h2></section><!-- Was 4.5.1.1 / #ldpr-4_5_1_1 -->
389
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   745
	<blockquote>
463
ae72388dbb82 start action-127 paging use of [23]xx response code; also changed 'informative' to 'non-normative' so sandro is happy[ier]
John Arwe
parents: 462
diff changeset
   746
		Non-normative note: Clients might provide triples equivalent to those already in the resource's state,
389
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   747
		e.g. as part of a GET/update representation/PUT sequence, and those PUT requests are intended to work as long as the 
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   748
		server-controlled triples are identical on the GET response and the subsequent PUT request.
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   749
	</blockquote>
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   750
		
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   751
	<section id="ldpr-put-precond"><h2 class="normal"><a title="LDP client">LDP clients</a> SHOULD use the HTTP <code>If-Match</code>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   752
		header and HTTP <code>ETags</code> to ensure it isn’t
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   753
		modifying a resource that has changed since the client last retrieved
372
d85ca5c8cb68 Preparing for profiles - conformance section updates; add link to IETF draft
John Arwe
parents: 370
diff changeset
   754
		its representation. <a title="LDP server">LDP servers</a> SHOULD require the HTTP <code>If-Match</code> header and HTTP <code>ETags</code>
d85ca5c8cb68 Preparing for profiles - conformance section updates; add link to IETF draft
John Arwe
parents: 370
diff changeset
   755
		to detect collisions. <a title="LDP server">LDP servers</a> MUST respond with status code 412
122
14197f56039e Issue-74 resolution - 428 precondition required
John Arwe
parents: 120
diff changeset
   756
		(Condition Failed) if <code>ETag</code>s fail to match when there are no other
372
d85ca5c8cb68 Preparing for profiles - conformance section updates; add link to IETF draft
John Arwe
parents: 370
diff changeset
   757
		errors with the request [[!HTTP11]].  <a title="LDP server">LDP servers</a> that require conditional requests MUST respond with status code 428
122
14197f56039e Issue-74 resolution - 428 precondition required
John Arwe
parents: 120
diff changeset
   758
		(Precondition Required) when the absence of a precondition is the only reason for rejecting the request [[!RFC6585]].
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   759
	</h2></section><!-- Was 4.5.2 / #ldpr-4_5_2 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   760
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   761
	<section id="ldpr-put-failed"><h2 class="normal">
389
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   762
		If an otherwise valid HTTP <code>PUT</code> request is received that contains triples the server 
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   763
		chooses not to persist, e.g. unknown content,
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   764
		<a title="LDP server">LDP servers</a> MUST respond with an appropriate 4xx range status code
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   765
		[[HTTP11]].  
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   766
		<a title="LDP server">LDP servers</a> SHOULD provide a corresponding response body containing
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   767
		information about which triples could not be
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   768
		persisted.
f1dbb042137b Resolve ACTION-109 Update spec to reflect 10/21 resolution for ignoring triples on PUT
John Arwe
parents: 388
diff changeset
   769
		The format of the 4xx response body is not constrained by LDP.
416
166375df8bf8 Various editorial and validation fixes
sspeiche
parents: 415
diff changeset
   770
		<!-- TODO: MUST respond with Link rel='describedBy' as in 4.2.13 -->
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   771
	</h2></section><!-- Was 4.5.4 / #ldpr-4_5_4 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   772
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   773
	<section id="ldpr-put-create"><h2 class="normal"><a title="LDP server">LDP servers</a> MAY choose to allow the creation of new resources using HTTP <code>PUT</code>.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   774
	</h2></section><!-- Was 4.5.6 / #ldpr-4_5_6 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   775
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   776
	<section id="ldpr-put-simpleupdate"><h2 class="normal"><a title="LDP server">LDP servers</a> SHOULD allow clients to update resources without
33
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   777
		requiring detailed knowledge of server-specific constraints.  
451
f68e4a59fba1 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 450
diff changeset
   778
		This is a consequence of the requirement to enable simple creation and modification of LDPRs.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   779
	</h2></section><!-- Was 4.5.7 / #ldpr-4_5_7 -->	
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   780
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   781
		
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   782
<section id="ldpr-HTTP_DELETE">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   783
<h2>HTTP DELETE</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   784
	<p>This specification imposes the following new requirements on HTTP <code>DELETE</code> for LDPRs 
37
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   785
		only when the LDPR supports that method.  This specification does not impose any
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   786
		new requirement to support that method, and [[!HTTP11]] makes it optional.</p>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   787
	<p>Additional requirements on HTTP <code>DELETE</code> of LDPRs within containers can be found in
466
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   788
	<a href="#ldpc-HTTP_DELETE" class="sectionRef"></a>.
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
   789
	</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   790
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   791
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   792
<section id="ldpr-HTTP_HEAD">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   793
<h2>HTTP HEAD</h2>
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   794
	<p>Note that certain LDP mechanisms, such as <a href="#ldpr-Paging">paging</a>, rely on HTTP headers, and HTTP generally requires that
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   795
		<code>HEAD</code> responses include the same headers as <code>GET</code> responses.  
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   796
		Thus, implementers should also carefully read sections <a href="#ldpr-HTTP_GET"></a> 
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   797
		and <a href="#ldpr-HTTP_OPTIONS"></a>.</p>
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   798
	<section id="ldpr-head-must"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST support the HTTP <code>HEAD</code> method.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   799
	</h2></section><!-- Was 4.7.1 / #ldpr-4_7_1 -->
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   800
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   801
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   802
<section id="ldpr-HTTP_PATCH">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   803
<h2>HTTP PATCH</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   804
	<p>This specification imposes the following new requirements on HTTP <code>PATCH</code> for LDPRs 
37
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   805
		only when the LDPR supports that method.  This specification does not impose any
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   806
		new requirement to support that method, and [[!HTTP11]] makes it optional.
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   807
		Any server-imposed constraints on LDPR creation or update  
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   808
		<a href="#ldpr-gen-pubclireqs">must be advertised</a> to clients.
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   809
	</p>	
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   810
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   811
	<section id="ldpr-patch-create"><h2 class="normal"><a title="LDP server">LDP servers</a> SHOULD NOT allow clients to create new resources using <code>PATCH</code>.
393
8197019f4604 ACTION-110 Update spec to reflect 10/21 resolution for normative changes to align vanilla/chocolate
John Arwe
parents: 389
diff changeset
   812
		<a href="#ldpc-HTTP_POST"><code>POST</code> (to an LDPC)</a> and/or <a href="#ldpr-HTTP_PUT"><code>PUT</code></a> should be used as the standard way to create new LDPRs.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   813
	</h2></section><!-- Was 4.8.3 / #ldpr-4_8_3 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   814
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   815
	<section id="ldpr-patch-acceptpatch"><h2 class="normal"><a title="LDP server">LDP servers</a> that support <code>PATCH</code> MUST
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   816
		include an <code>Accept-Patch</code> HTTP response header [[!RFC5789]] on HTTP <code>OPTIONS</code>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   817
		requests, listing patch document media type(s) supported by the server.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   818
	</h2></section><!-- Was 4.8.4 / #ldpr-4_8_4 -->
186
a3471f4667d8 Removed closed issues that required no new spec changes: 50, 56, 16, 19, 17
sspeiche
parents: 185
diff changeset
   819
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   820
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   821
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   822
<section id="ldpr-HTTP_OPTIONS">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   823
<h2>HTTP OPTIONS</h2>
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   824
	<p>This specification imposes the following new requirements on HTTP <code>OPTIONS</code> for LDPRs 
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   825
		beyond those in [[!HTTP11]].  Other sections of this specification, for example 
167
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   826
		<a href="#ldpr-HTTP_PATCH">PATCH</a>,
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   827
		<a href="#header-accept-post">Accept-Post</a>
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   828
		and <a href="#ldpr-paging-HTTP_OPTIONS">Paging</a>,
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   829
		add other requirements on <code>OPTIONS</code> responses.
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   830
		</p>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   831
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   832
	<section id="ldpr-options-must"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST support the HTTP <code>OPTIONS</code> method.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   833
	</h2></section><!-- Was 4.9.1 / #ldpr-4_9_1 -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   834
		
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   835
	<section id="ldpr-options-allow"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST indicate their support for HTTP Methods by
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   836
		responding to a HTTP <code>OPTIONS</code> request on the LDPR’s URL with the HTTP
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   837
		Method tokens in the HTTP response header <code>Allow</code>.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   838
	</h2></section><!-- Was 4.9.2 / #ldpr-4_9_2 -->
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   839
		
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   840
</section>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   841
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   842
<section id="ldpr-Paging">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   843
<h2>Paging</h2>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   844
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   845
<section class="informative" id="ldpr-PagingIntro">
463
ae72388dbb82 start action-127 paging use of [23]xx response code; also changed 'informative' to 'non-normative' so sandro is happy[ier]
John Arwe
parents: 462
diff changeset
   846
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   847
<h3>Introduction</h3>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   848
	<p>It sometimes happens that a
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   849
		resource is too large to reasonably transmit its representation in a
412
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   850
		single HTTP response.  
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   851
		To address this problem, servers should support a technique called Paging.  
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   852
		When a client retrieves such a resource, the server redirects the client to a "first page" resource, and includes in its response
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   853
		a link to the next part of the resource's state, all at a URLs of the server's choosing.
448
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   854
		The triples in the representation of the <a title="Single-page resource">each page of an LDPR</a>
72e366f1195f ACTION-123 Added concepts of LDP-RDF-Resource and LDP-Binary-Resource
sspeiche
parents: 447
diff changeset
   855
		are typically a subset of the triples from the <a title="Paged resource">paged resource</a>.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   856
	</p>
372
d85ca5c8cb68 Preparing for profiles - conformance section updates; add link to IETF draft
John Arwe
parents: 370
diff changeset
   857
	<p><a title="LDP server">LDP servers</a> may respond to requests for a
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   858
		resource by redirecting to the first page of the resource and, with that, returning 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   859
		a <code>Link &lt;next-page-URL&gt;;type='next'</code> header containing the URL for the next page.
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   860
		Clients inspect each response for the link header to see if additional pages
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   861
		are available; paging does not affect the choice of HTTP status code.
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   862
		Note that paging is lossy, as described in [[RFC5005]], and so (as stated there)
412
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   863
		clients should not make any assumptions about a set of pages being a complete or 
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   864
		coherent snapshot of a resource's state.</p>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   865
	<p>
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   866
		Looking at an example resource representing Example Co.'s customer
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   867
		relationship data, identified by the URI <code>http://example.org/customer-relations</code>,
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   868
		we’ll split the response across two pages.  
412
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   869
		The client 
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   870
		retrieves <code>http://example.org/customer-relations</code>, and
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   871
		the server responds with <a href="#atrisk-333">status code <code>333 (Returning Related)</code></a>, 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   872
		a <code>Location: http://example.org/customer-relations?page1</code> HTTP response header,
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   873
		and the following representation:
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   874
	</p>
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   875
419
afe7bcda2e56 + ids on remaining examples
Eric Prud'hommeaux <eric@w3.org>
parents: 418
diff changeset
   876
<pre class="example" id="ldpc-ex-page1"># The following is the representation of
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   877
#    http://example.org/customer-relations?page1
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   878
#    Requests on the URI will result in responses that include the following HTTP header
402
935e1e08d2bb Fix some typos around paging, move to single quotes for link relations per 5988
John Arwe
parents: 395
diff changeset
   879
#       Link: &lt;http://example.org/customer-relations?p=2&gt;; rel='next'
412
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   880
#    This Link header is how clients discover the URI of the next page in sequence,
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   881
#    and that the resource supports paging.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   882
@prefix rdf: &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt;.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   883
@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   884
@prefix foaf: &lt;http://xmlns.com/foaf/0.1/&gt;.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   885
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   886
@prefix o: &lt;http://example.org/ontology/&gt;.
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   887
@base &lt;http://example.org/customer-relations&gt;.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   888
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   889
&lt;&gt;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   890
   a o:CustomerRelations;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   891
   dcterms:title "The customer information for Example Co.";
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   892
   o:client &lt;#JohnZSmith&gt;, &lt;#BettyASmith&gt;, &lt;#JoanRSmith&gt;. 
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   893
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   894
&lt;#JohnZSmith&gt;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   895
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   896
   o:status o:ActiveCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   897
   foaf:name "John Z. Smith".
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   898
&lt;#BettyASmith&gt;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   899
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   900
   o:status o:PreviousCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   901
   foaf:name "Betty A. Smith".
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   902
 &lt;#JoanRSmith&gt;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   903
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   904
   o:status o:PotentialCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   905
   foaf:name "Joan R. Smith".</pre>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   906
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   907
	<p>
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   908
		Because the server includes a <code>Link: &lt;http://example.org/customer-relations?p=2&gt;; rel='next'</code>
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   909
		response header, and the status code is 3xx (<code>333 (Returning Related)</code> in this case), 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   910
		the client knows that more data exists and where to find it.
232
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   911
		The server determines the size of the pages using application specific methods not defined
402
935e1e08d2bb Fix some typos around paging, move to single quotes for link relations per 5988
John Arwe
parents: 395
diff changeset
   912
		within this specificiation. The next page link's target URI is also
232
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   913
		defined by the server and not this specification.
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   914
	</p>
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   915
	<p>
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   916
		The following example is the result of retrieving
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   917
		the next page; 
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
   918
		the server responds with status code <code>200 (OK)</code> and the following representation:
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   919
	</p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   920
419
afe7bcda2e56 + ids on remaining examples
Eric Prud'hommeaux <eric@w3.org>
parents: 418
diff changeset
   921
<pre class="example" id="ldpc-ex-page2"># The following is the representation of
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   922
#  http://example.org/customer-relations?p=2
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   923
#
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   924
#  There is no "next" Link in the server's response, so this is the final page.
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   925
#
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   926
@prefix rdf: &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt;.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   927
@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   928
@prefix foaf: &lt;http://xmlns.com/foaf/0.1/&gt;.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   929
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   930
@prefix o: &lt;http://example.org/ontology/&gt;.
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   931
@base &lt;http://example.org/customer-relations&gt;.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   932
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   933
&lt;&gt;
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   934
   o:client &lt;#GlenWSmith&gt;, &lt;#AlfredESmith&gt;. 
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   935
 
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   936
&lt;#GlenWSmith&gt;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   937
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   938
   o:status o:ActiveCustomer, o:GoldCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   939
   foaf:name "Glen W. Smith".
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   940
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   941
&lt;#AlfredESmith&gt;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   942
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   943
   o:status o:ActiveCustomer, o:BronzeCustomer;
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   944
   foaf:name "Alfred E. Smith".
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   945
 </pre>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   946
	<p>
215
da72115eb40b Various updates per review of Raul
sspeiche
parents: 213
diff changeset
   947
		In this example, there are only two customers provided in the
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   948
		final page.  To indicate this is the last page, the server omits the <code>Link: rel='next'</code> 
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   949
		header in its response.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   950
	</p>
412
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   951
	<p>
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   952
		As mentioned above, retrieving all the pages offered by a server gives no guarantee to a client
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   953
		that it knows the entire state of the server.  For example, after the server constructs the
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   954
		the first page representation, another
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   955
		actor could delete <code>client#BettyASmith</code> from the server.  
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   956
	</p>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   957
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   958
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   959
<section id="ldpr-PagingGET">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   960
<h3>HTTP GET</h3>
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   961
	<p>In addition to the requirements set forth in <a href="#ldpr-HTTP_GET" class="sectionRef"></a> on HTTP <code>GET</code>, 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   962
		<a title="LDP server">LDP servers</a> that support paging must 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   963
		also follow the requirements in this section for all <a title="Paged resource">paged resources</a>
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   964
		and their associated <a title="Single-page resource">single-page resources</a>.
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   965
	</p>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   966
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   967
	<section id="ldpr-pagingGET-sequences-change"><h2 class="normal"><a title="LDP server">LDP servers</a> MAY
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   968
		add <a title="Single-page resource">single-page resources</a> to a 
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   969
		<a title="Paged resource">paged resource's</a> sequence over time,
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   970
		but SHOULD only add pages to the end of a sequence.
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   971
		</h2><!-- Was 4.10.2.1 / #ldpr-pagingGET-sequences-change -->
463
ae72388dbb82 start action-127 paging use of [23]xx response code; also changed 'informative' to 'non-normative' so sandro is happy[ier]
John Arwe
parents: 462
diff changeset
   972
		<blockquote>Non-normative note: 
414
a5d0c19a9474 remote-only respec whining
John Arwe
parents: 413
diff changeset
   973
		As a result, clients retrieving any <a title="Single-page resource">single-page resource</a> several times can observe its place in the sequence
413
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   974
		change as the state of the <a title="Paged resource">paged resource</a> changes.
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   975
		For example, a nominally last page's server might provide a
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   976
		<a>next page link</a> when the page is retrieved.  Similar situations arise when the page sequence crosses server boundaries; 
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   977
		server A might host the initial portion of a sequence that links to the last page server A is aware of,  
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   978
		hosted on server B, and server B might extend the sequence of pages.
55af75032d16 Fix respec messages that only show up on remote server, hit paging examples to remove appearance of inlining
John Arwe
parents: 412
diff changeset
   979
		</blockquote>
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   980
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   981
		<section id="ldpr-pagingGET-first-allowed-onpages"><h2 class="normal">
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   982
			<a title="LDP server">LDP servers</a> MAY provide 
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   983
			a <a>first page link</a> when responding to 
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   984
			requests with any <a title="Single-page resource">single-page resource</a> as the <code>Request-URI</code>.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   985
		</h2></section><!-- Was 4.10.2.1.1 / #ldpr-pagingGET-sequences-change -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   986
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   987
		<section id="ldpr-pagingGET-last-allowed-onpages"><h2 class="normal"><a title="LDP server">LDP servers</a> MAY
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   988
			provide a <a>last page link</a>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   989
			in responses to <code>GET</code> requests with any <a title="Single-page resource">single-page resource</a> as the <code>Request-URI</code>.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   990
		</h2></section><!-- Was 4.10.2.1.3 / #ldpr-pagingGET-last-allowed-onpages -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   991
	</section>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   992
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   993
	<section id="ldpr-pagingGET-next-reqd"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST
412
b5f309858d98 Resolve ACTION-113 Update spec to reflect 11/04 resolution to remove 303 and have client use first/next links to detect paging
John Arwe
parents: 410
diff changeset
   994
		provide a <a>next page link</a>
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   995
		in responses to <code>GET</code> requests with any <a title="Single-page resource">single-page resource</a> 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   996
		<em>other than the final page</em>
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   997
		as the <code>Request-URI</code>.
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
   998
		This is the mechanism by which clients can discover the URL of the next page. 
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
   999
	</h2><!-- Was 4.10.2.2 / #ldpr-pagingGET-next-reqd-change -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1000
	
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1001
		<section id="ldpr-pagingGET-lastnext-prohibited"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST NOT
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1002
			provide a <a>next page link</a>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1003
			in responses to <code>GET</code> requests with the final <a title="Single-page resource">single-page resource</a> 
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1004
			as the <code>Request-URI</code>.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1005
			This is the mechanism by which clients can discover the end of the page sequence
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1006
			as currently known by the server.  
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1007
		</h2></section><!-- Was 4.10.2.2.1 / #ldpr-pagingGET-lastnext-prohibited -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1008
		
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1009
		<section id="ldpr-pagingGET-prev-allowed"><h2 class="normal"><a title="LDP server">LDP servers</a> MAY
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1010
			provide a <a>previous page link</a>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1011
			in responses to <code>GET</code> requests with any <a title="Single-page resource">single-page resource</a>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1012
			<em>other than the first page</em>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1013
			as the <code>Request-URI</code>.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1014
			This is one mechanism by which clients can discover the URL of the previous page.  
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1015
		</h2></section><!-- Was 4.10.2.2.2 / #ldpr-pagingGET-prev-allowed -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1016
		
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1017
		<section id="ldpr-pagingGET-firstprev-prohibited"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST NOT
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1018
			provide a <a>previous page link</a>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1019
			in responses to <code>GET</code> requests with the <em>first</em> <a title="Single-page resource">single-page resource</a> 
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1020
			as the <code>Request-URI</code>.
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1021
			This is one mechanism by which clients can discover the beginning of the page sequence
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1022
			as currently known by the server.  
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1023
		</h2></section><!-- Was 4.10.2.2.3 / #ldpr-pagingGET-firstprev-prohibited -->
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1024
	</section>
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1025
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1026
	<section id="ldpr-pagingGET-page-type-reqd"><h2 class="normal"><a title="LDP server">LDP servers</a> MUST
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1027
		provide an HTTP <code>Link</code>
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1028
		header whose target URI is <code>http://www.w3.org/ns/ldp#Page</code>, and whose link relation type is <code>type</code> [[!RFC5988]]
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1029
		in responses to <code>GET</code> requests with any <a title="Single-page resource">single-page resource</a> 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1030
		as the <code>Request-URI</code>.
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1031
		This is one mechanism by which clients know that the resource is one of a sequence of pages.  
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1032
	</h2></section><!-- Was 4.10.2.4 / #ldpr-pagingGET-page-type-reqd -->
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1033
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1034
	<div class="atrisk" id="atrisk-333"><p class="atrisktext">Feature At Risk</p>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1035
		<p>The LDP Working Group proposes incorporation of the features described in the next compliance clause.</p>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1036
		<ul>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1037
		<li><p>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1038
		A <a href="http://lists.w3.org/Archives/Public/www-tag/2013Dec/0041.html">TAG discussion</a> has started,
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1039
		whose goal is to reduce the need for two request-response round trips down to one when retrieving what 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1040
		turns out to be the first page of a paged resource, by defining a new
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1041
		HTTP response code in the <code>2xx</code> or <code>3xx</code> class that would allow a server to
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1042
		respond to <code>GET request-uri</code> requests with the representation of the first page 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1043
		(whose URI is <code>first-page-uri</code>, not <code>request-uri</code>) of a multi-page response.
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1044
		</p></li>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1045
		<li><p>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1046
		For the purposes of drafting this section, we assume that the 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1047
		new code's value is <code>333 (Returning Related)</code>,
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1048
		<a href="http://lists.w3.org/Archives/Public/www-tag/2014Jan/0023.html">an LDP extrapolation from TAG discussions,</a>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1049
		and its definition is given by 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1050
		<a href="http://lists.w3.org/Archives/Public/www-tag/2014Jan/0015.html">Henry Thompson's strawman</a>, with the substitution of 333 for 2xx.
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1051
		Note: nothing prevents servers or clients from using <code>303 See Other</code> responses to 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1052
		requests for <a title="Paged resource">paged resources</a>.  The only significant difference between 303 and 333 responses
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1053
		is the extra round trip required for the client to retrieve the representation of the first page when using 303.
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1054
		</p></li>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1055
		<li><p>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1056
		Once LDP is a
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1057
		Candidate Recommendation, the LDP WG will make an assessment based on the status at IETF,
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1058
		working with the W3C Director, to either use the newly defined response code 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1059
		as documented in this section or to revert to a classic 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1060
		<code>303</code> response pattern.
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1061
		</p></li>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1062
		</ul>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1063
	</div>
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1064
		
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1065
	<section id="ldpr-status-code"><h2 class="normal"><a title="LDP server">LDP servers</a> SHOULD respond 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1066
		with HTTP status code <code>333 (Returning Related)</code> 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1067
		to successful <code>GET</code> requests with any <a title="Paged resource">paged resource</a> 
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1068
		as the <code>Request-URI</code>, although any appropriate code MAY be used.
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1069
	</h2></section>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
  1070
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
  1071
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1072
<section id="ldpr-paging-HTTP_OPTIONS">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1073
<h3>HTTP OPTIONS</h3>
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
  1074
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1075
	<p>In addition to the requirements set forth in 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1076
		<a href="#ldpr-HTTP_OPTIONS" class="sectionRef"></a> on HTTP <code>OPTIONS</code>, 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1077
		<a title="LDP server">LDP servers</a> that support paging must also 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1078
		follow the requirements in this section for all <a title="Paged resource">paged resources</a>.
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1079
		Note that LDP only requires enough from <code>OPTIONS</code> 
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1080
		for discovery of paging support on a resource, which is considerably
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1081
		less than is required for HTTP <code>GET</code>.  
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1082
		This lowers server implementation effort.
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1083
	</p>
464
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1084
	
77fd28c9eb94 action-127 use tag [23]xx status code for paging; also change paging to be for LDP-RRs as a consequence of issue-89 vocab changes
John Arwe
parents: 463
diff changeset
  1085
	<!-- TODO: This section is empty - looks weird, and it is linked to from other sections -->
395
0408e1e5bbf8 ACTION-105: Update spec to reflect 9/30 resolution moving Paging links to HTTP headers (partial: does not include sort criteria changes yet)
John Arwe
parents: 393
diff changeset
  1086
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
  1087
</section> <!-- h3 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
  1088
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
  1089
</section> <!-- h2 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
  1090
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
  1091
</section> <!-- h1 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
  1092
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1093
<section id="ldpc">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1094
<h1>Linked Data Platform Containers</h1>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1095
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1096
<section class="informative" id="ldpc-informative">		
466
7b840138bdf1 editorial cleanup; substantive hits to ldpc delete, remove reqt for direct containers to materialize insertedContentRelation (since it's value is fixed)
John Arwe
parents: 465
diff changeset
  1097
<h2>Introduction</h2>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1098
	<p>Many HTTP applications and sites have organizing
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1099
		concepts that partition the overall space of resources into smaller
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1100
		containers. Blog posts are grouped into blogs, wiki pages are grouped
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1101
		into wikis, and products are grouped into catalogs. Each resource
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1102
		created in the application or site is created within an instance of
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1103
		one of these container-like entities, and users can list the existing
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1104
		artifacts within one. Containers answer some basic questions, which
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1105
		are:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1106
	<ol>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1107
		<li>To which URLs can I POST to create new resources?</li>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1108
		<li>Where can I GET a list of existing resources?</li>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1109
		<li>How	is the order of the container entries expressed?</li>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1110
		<li>How do I get information about the members along with the container?</li>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1111
		<li>How	can I ensure the resource data is easy to query?</li>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1112
	</ol>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1113
	<p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1114
		This document defines the representation and behavior of containers
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1115
		that address these issues. The set of members of a container is
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1116
		defined by a set of triples in its representation (and state) called
373
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1117
		the <a title="Membership triples">membership triples</a> that follow a consistent pattern
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1118
		(see the linked-to definition for the possible patterns). 
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1119
		The membership triples of a container all
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1120
		have the same predicate, called the membership predicate, 
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1121
		and either the subject or the object is also a consistent value
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1122
		– the remaining position of the membership
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1123
		triples (the one that varies) define the members of the container. 
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1124
		In the simplest cases, the
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1125
		consistent value will be the LDPC resource's URI, but it does not
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1126
		have to be. The membership predicate is also variable and will often
453
a70c321daf12 ACTION-120 (Part 3) Added ldp:member
sspeiche
parents: 452
diff changeset
  1127
		be a predicate from the server application vocabulary or the <code>ldp:member</code> predicate.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1128
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1129
	<p>This document includes a set of guidelines for
415
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1130
		creating new resources and adding them to the list of
104
78fd14175304 ISSUE-59 5.3.2 limited rdf:type of ldp:Container, removed 5.6.3, reworded 5.6.2, updated 1.
sspeiche
parents: 102
diff changeset
  1131
		members of a container. It goes on to explain how to learn about a set of related
415
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1132
		resources, regardless of how they were created or added to the container's membership.
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1133
		It also defines behavior when resources created using a container are later deleted;
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1134
		deleting containers removes membership information and
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1135
		possibly performs some cleanup tasks on unreferenced member resources.</p>
104
78fd14175304 ISSUE-59 5.3.2 limited rdf:type of ldp:Container, removed 5.6.3, reworded 5.6.2, updated 1.
sspeiche
parents: 102
diff changeset
  1136
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1137
	<p>The following illustrates a very simple
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1138
		container with only three members and some information about the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1139
		container (the fact that it is a container and a brief title):</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1140
419
afe7bcda2e56 + ids on remaining examples
Eric Prud'hommeaux <eric@w3.org>
parents: 418
diff changeset
  1141
<pre class="example" id="ldpc-ex-simple"># The following is the representation of
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1142
#    http://example.org/c1/
309
ea3cce737943 Get examples to validate, per http://lists.w3.org/Archives/Public/public-ldp-wg/2013Aug/0002.html and messages that came up once those noted were fixed.
John Arwe
parents: 274
diff changeset
  1143
<!-- @base is here only so it's easier to paste into validators for checking -->
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1144
# @base &lt;http://example.org/c1/&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1145
@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1146
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1147
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1148
&lt;&gt;
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1149
   a ldp:Container, ldp:BasicContainer;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1150
   dcterms:title "A very simple container";
467
0eed67a3db4e Simplified some of the container examples
sspeiche
parents: 466
diff changeset
  1151
   ldp:contains &lt;r1&gt;, &lt;r2&gt;, &lt;r3&gt;.</pre>
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1152
 
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1153
   	<figure id="fig-ldpc-basic">
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1154
        <img src="images/ldpc-basic.png" alt="Sample Linked Data Platform Basic Container" />
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1155
        <figcaption>Sample of Linked Data Platform Basic Container</figcaption>
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1156
    </figure>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1157
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1158
	<p>This example is very straightforward - the
467
0eed67a3db4e Simplified some of the container examples
sspeiche
parents: 466
diff changeset
  1159
	membership and containment predicate are both <code>ldp:contains</code> and the other
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1160
	consistent membership value is the container's
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1161
	URI, occurring in the subject position of the triples. 
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1162
	A POST to this container will create a new resource
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1163
	and add it to the list of members by adding a new membership triple
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1164
	to the container.  This type of container is also refered to as
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1165
	<a title="Linked Data Platform Basic Container">LDP Basic Container</a>.</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1166
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1167
	<p>Sometimes it is useful to use a subject
373
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1168
	other than the container itself as the consistent membership value, and/or to use
467
0eed67a3db4e Simplified some of the container examples
sspeiche
parents: 466
diff changeset
  1169
	a  predicate from an application's domain model as the membership predicate. Let's
88
a02636c16f05 Fixed typo in new text
sspeiche
parents: 87
diff changeset
  1170
	start with a domain resource for a person's net worth, as illustrated below:</p>
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1171
			
233
37842c77d995 Fixed dup id problem in example
sspeiche
parents: 232
diff changeset
  1172
<pre class="example" id="ldpc-ex-membership-partial"># The following is a partial representation of
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1173
#   http://example.org/netWorth/nw1
309
ea3cce737943 Get examples to validate, per http://lists.w3.org/Archives/Public/public-ldp-wg/2013Aug/0002.html and messages that came up once those noted were fixed.
John Arwe
parents: 274
diff changeset
  1174
<!-- @base is here only so it's easier to paste into validators for checking -->
ea3cce737943 Get examples to validate, per http://lists.w3.org/Archives/Public/public-ldp-wg/2013Aug/0002.html and messages that came up once those noted were fixed.
John Arwe
parents: 274
diff changeset
  1175
# @base &lt;http://example.org/netWorth/nw1/&gt;
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1176
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1177
@prefix o: &lt;http://example.org/ontology/&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1178
&lt;&gt;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1179
   a o:NetWorth;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1180
   o:netWorthOf &lt;http://example.org/users/JohnZSmith&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1181
   o:asset 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1182
      &lt;assetContainer/a1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1183
      &lt;assetContainer/a2&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1184
   o:liability 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1185
      &lt;liabilityContainer/l1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1186
      &lt;liabilityContainer/l2&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1187
      &lt;liabilityContainer/l3&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1188
</pre>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1189
	<p>From this example, there is a <code>rdf:type</code> of <code>o:NetWorth</code> indicating the
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1190
	resource represents an instance of a person's net worth and <code>o:netWorthOf</code> predicate indicating 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1191
	the associated person.  There are two sets of same-subject, same-predicate pairings; one for assets and
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1192
	one for liabilities.  It would be helpful to be able to associate these multi-valued sets using a URL
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1193
	for them to assist with managing these, this is done by associating containers with them as 
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1194
	illustrated in the 3 examples below:
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1195
	</p>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1196
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1197
<pre class="example" id="ldpc-ex-membership-full"># The following is an elaborated representation of LDPR
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1198
#   http://example.org/netWorth/nw1
309
ea3cce737943 Get examples to validate, per http://lists.w3.org/Archives/Public/public-ldp-wg/2013Aug/0002.html and messages that came up once those noted were fixed.
John Arwe
parents: 274
diff changeset
  1199
<!-- @base is here only so it's easier to paste into validators for checking -->
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1200
# @base &lt;http://example.org/netWorth/nw1/&gt;.
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1201
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1202
@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1203
@prefix o: &lt;http://example.org/ontology/&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1204
&lt;&gt;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1205
   a o:NetWorth;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1206
   o:netWorthOf &lt;http://example.org/users/JohnZSmith&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1207
   o:asset 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1208
      &lt;assetContainer/a1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1209
      &lt;assetContainer/a2&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1210
   o:liability 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1211
      &lt;liabilityContainer/l1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1212
      &lt;liabilityContainer/l2&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1213
      &lt;liabilityContainer/l3&gt;.
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1214
</pre>
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1215
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1216
<pre class="example" id="ldpc-ex-membership-subj"># The following is an elaborated representation of LDPC
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1217
#   http://example.org/netWorth/nw1/assetContainer/
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1218
<!-- @base is here only so it's easier to paste into validators for checking -->
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1219
# @base &lt;http://example.org/netWorth/nw1/assetContainer/&gt;
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1220
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1221
@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1222
@prefix o: &lt;http://example.org/ontology/&gt;.
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1223
&lt;&gt;
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1224
   a ldp:Container, ldp:DirectContainer;
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1225
   dcterms:title "The assets of JohnZSmith";
415
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1226
   ldp:containerResource &lt;&gt;;
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1227
   ldp:containsRelation o:asset;
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1228
   ldp:contains &lt;a1&gt;, &lt;a2&gt;.
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1229
</pre>
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1230
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1231
<pre class="example" id="ldpc-ex-membership-full-liabcont"># The following is an elaborated representation of LDPC
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1232
#   http://example.org/netWorth/nw1/liabilityContainer/
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1233
<!-- @base is here only so it's easier to paste into validators for checking -->
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1234
# @base &lt;http://example.org/netWorth/nw1/liabilityContainer/&gt;
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1235
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1236
@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1237
@prefix o: &lt;http://example.org/ontology/&gt;.
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1238
&lt;&gt;
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1239
   a ldp:Container, ldp:DirectContainer;
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1240
   dcterms:title "The liabilities of JohnZSmith";
415
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1241
   ldp:containerResource &lt;&gt;;
12864dde579d Resolve ACTION-112 Update spec to reflect 10/28 resolution for Issue-81 part 1: new predicate names
John Arwe
parents: 414
diff changeset
  1242
   ldp:containsRelation o:liability;
460
1f6e06fd7272 typo: added missing brackets in example 7
Arnaud Le Hors <lehors@us.ibm.com>
parents: 459
diff changeset
  1243
   ldp:contains &lt;l1&gt;, &lt;l2&gt;, &lt;l3&gt;.
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1244
</pre>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1245
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1246
	<p>The essential structure of the container is
373
0562f8c4d4d4 Cleanup of known cases where text assumed "normal" membership triple pattern, did not consider the flipped/MO cases
John Arwe
parents: 372
diff changeset
  1247
	the same, but in this example, the consistent membership value (still in the subject position) is not the
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1248
	container itself – it is a separate net worth resource. The
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1249
	membership predicates are <code>o:asset</code> and <code>o:liability</code> – predicates
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1250
	from the domain model. A POST of an asset representation to the asset container will create a new
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1251
	asset and add it to the list of	members by adding a new membership triple
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1252
	to the resource and containment triple to the container. You might wonder why
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1253
	<code>http://example.org/netWorth/nw1</code> isn't made a container itself and POST
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1254
	the new asset directly there. That would be a fine design if <code>http://example.org/netWorth/nw1</code>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1255
	had only assets, but if it has separate predicates for assets and liabilities,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1256
	that design will not work because it is unspecified to which predicate the POST
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1257
	should add a membership triple. Having separate <code>http://example.org/netWorth/nw1/assetContainer/</code> 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1258
	and <code>http://example.org/netWorth/nw1/liabilityContainer/</code> container
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1259
	resources allows both assets and liabilities to be created.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1260
	</p>
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1261
	<p>This type of container is refered to as an <a title="Linked Data Platform Direct Container">LDP Direct Container</a>.  An
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1262
	 <a title="Linked Data Platform Basic Container">LDP Basic Container</a> is a constrained form of 
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1263
	 <a title="Linked Data Platform Direct Container">LDP Direct Container</a> where the 
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1264
	 membership predicate is <code>ldp:contains</code> and the container resource is the container itself.
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1265
	</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1266
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1267
	<p>As seen in the <a href="#ldpc-ex-membership-subj"><code>assetContainer/</code> example</a>, 
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1268
	clients cannot correctly guess
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1269
	at the membership triples, so the example includes this information in
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1270
	triples whose subject is the LDPC resource itself.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1271
	</p>
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1272
	
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1273
	<p>Alternatively, servers may provide the net worth resource and supporting containers in a single response
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1274
	representations.  When doing this, a preference would be for RDF formats that support multiple named graphs, one
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1275
	named graph for the net worth resource and then two others for asset and liability containers.  This allows for
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1276
	the membership triples to be represented with the named graph for the net worth resource, while the containment triples
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1277
	would be represented within the liability and asset containers [[rdf11-concepts]].  Generally, the membership triples belong
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1278
	to the representation of a LDP-RR and the containment triples belong to the representation of the LDPC.
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1279
	</p>
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1280
	
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1281
	<p>Additionally, we could extend our net worth example to include a container for
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1282
	advisors (people) that have managed the assets and liabilities.  We have decided
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1283
	to identify these advisors with URLs that contain a fragment (hash) to represent
462
3a7f9b05bad8 proofing through 454
John Arwe
parents: 461
diff changeset
  1284
	these real-world resources, not the documents that describe them.</p>
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1285
	
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1286
<pre class="example" id="ldpc-ex-membership-full"># The following is an elaborated representation of
456
6130538abdf0 ACTION-124 LDPR-RR as named graphs
sspeiche
parents: 454
diff changeset
  1287
#   http://example.org/netWorth/nw1
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1288
# Adding o:advisor but eaving off o:asset and o:liability for brevity.
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1289
<!-- @base is here only so it's easier to paste into validators for checking -->
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1290
# @base &lt;http://example.org/netWorth/nw1/&gt;
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1291
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1292
@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1293
@prefix foaf: &lt;http://xmlns.com/foaf/0.1/&gt;.
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1294
@prefix o: &lt;http://example.org/ontology/&gt;.
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1295
&lt;&gt;
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1296
   a o:NetWorth;
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1297
   o:netWorthOf &lt;http://example.org/users/JohnZSmith&gt;;
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1298
   o:advisor
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1299
   	 &lt;advisorContainer/bob#me&gt;,
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1300
   	 &lt;advisorContainer/marsha#me&gt;.
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1301
   	 
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1302
&lt;advisorContainer/&gt;
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1303
   a ldp:Container, ldp:IndirectContainer;
465
26eb1d6d4fd6 fixing things found proofing SS updates and a few of Arnaud's email comments
John Arwe
parents: 464
diff changeset
  1304
   dcterms:title "The asset advisors of JohnZSmith";
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1305
   ldp:containerResource &lt;&gt;;
465
26eb1d6d4fd6 fixing things found proofing SS updates and a few of Arnaud's email comments
John Arwe
parents: 464
diff changeset
  1306
   ldp:containsRelation o:advisor;
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1307
   ldp:insertedContentRelation foaf:primaryTopic;
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1308
   ldp:contains
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1309
   	 &lt;advisorContainer/bob&gt;,
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1310
   	 &lt;advisorContainer/marsha&gt;.
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1311
</pre>	
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1312
	
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1313
	<p>To handle this type of indirection, the triple with predicate of <code>ldp:insertedContentRelation</code> and object of 
468
f960af656afb Simplified some of the container examples
sspeiche
parents: 467
diff changeset
  1314
	<code>foaf:primaryTopic</code> informs clients that when POSTing to this container, they need to include a triple of the
462
3a7f9b05bad8 proofing through 454
John Arwe
parents: 461
diff changeset
  1315
	form <code>(&lt;&gt;, foaf:primaryTopic, topic-URI)</code> to inform the server which URI to use 
3a7f9b05bad8 proofing through 454
John Arwe
parents: 461
diff changeset
  1316
	(<code>topic-URI</code>) in the new membership triple.</p>
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1317
	
462
3a7f9b05bad8 proofing through 454
John Arwe
parents: 461
diff changeset
  1318
	<p>This type of container is also referred to as an <a title="Linked Data Platform Indirect Container">LDP Indirect Container</a>. 
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1319
	It is similar to a an <a title="Linked Data Platform Direct Container">LDP Direct Container</a> 
468
f960af656afb Simplified some of the container examples
sspeiche
parents: 467
diff changeset
  1320
	but it provides an indirection to add (via a create request) as member any resource, 
462
3a7f9b05bad8 proofing through 454
John Arwe
parents: 461
diff changeset
  1321
	such as a URI representing a real-world object,
3a7f9b05bad8 proofing through 454
John Arwe
parents: 461
diff changeset
  1322
	that is different from the document that is created.</p>
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1323
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1324
	<p><a href="#fig-ldpc-types"></a> illustrates the 3 types: Basic, Direct and Indirect, along
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1325
	with their relationship to types of LDPRs.  It is not expected that there will be a container
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1326
	with a <code>rdf:type</code> solely of <code>ldp:Container</code>.</p>
450
e8d84dbc86dc ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 449
diff changeset
  1327
	
e8d84dbc86dc ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 449
diff changeset
  1328
	 <figure id="fig-ldpc-types">
e8d84dbc86dc ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 449
diff changeset
  1329
        <img src="images/ldpc1.png" alt="Types of Linked Data Platform Containers" />
e8d84dbc86dc ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 449
diff changeset
  1330
        <figcaption>Types of Linked Data Platform Containers</figcaption>
e8d84dbc86dc ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 449
diff changeset
  1331
    </figure>
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1332
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1333
<div class="ldp-issue-pending">
468
f960af656afb Simplified some of the container examples
sspeiche
parents: 467
diff changeset
  1334
<p>PENDING -- table work in progress, if found valuable...we'll keep.</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1335
	
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1336
	<p>The following table illustrates some differences between <a title="membership">membership</a> and 
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1337
	<a title="containment">containment</a> triples.  For details on the normative behavior, see appropriate sections
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1338
	below.
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1339
	</p>
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1340
	<table border="1" id="ldpc-mbrcntdiff">
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1341
		<thead><tr><th rowspan="2">Completed Request</th><th colspan="2">Effects</th></tr>
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1342
		       <tr><th>Membership</th><th>Containment</th></tr></thead>
468
f960af656afb Simplified some of the container examples
sspeiche
parents: 467
diff changeset
  1343
		<tr><td>LDPR created in LDPC (any subtype)</td><td>New triple based on type of container (see following rows)</td><td>New triple: 
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1344
			(LDPC, ldp:contains, LDPR)</td></tr>
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1345
		<tr><td>LDPR created in LDP-BC</td><td>New triple: (LDPC, ldp:contains, LDPR)</td><td>Same</td></tr>
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1346
		<tr><td>LDPR created in LDP-DC</td><td>New triple links LDP-RR to created LDPR. LDP-RR URI may be same as LDP-DC</td>
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1347
			<td>New triple: (LDPC, ldp:contains, LDPR)</td></tr>
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1348
		<tr><td>LDPR created in LDP-IC</td><td>New triple links LDP-RR to content indicated URI</td>
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1349
			<td>New triple: (LDPC, ldp:contains, LDPR)</td></tr>
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1350
		<tr><td>LDPR is deleted</td><td>Triples may be removed</td><td>Triples are removed
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1351
			</td></tr>
452
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1352
		<tr><td>LDPC is deleted</td><td>Triples and member resources may be removed</td><td>Triples of form 
c4b538b7e57f ACTION-120 (Part 2) Added concepts of containers (basic, direct and indirect) to LDPC intro
sspeiche
parents: 451
diff changeset
  1353
			(LDPC, ldp:contains, LDPR) and contained LDPRs are removed</td></tr>
449
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1354
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1355
	</table>
623bbfdea989 ACTION-120 (Part 1) Added concepts of containers (basic, direct and indirect)
sspeiche
parents: 448
diff changeset
  1356
</div>	
435
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1357
	<section id="ldpc-get_non-member_props"><h2 class="normal">Retrieving Only Non-member Properties
e9efbc3a3ba8 First attempt at correcting section ordering and anchors
sspeiche
parents: 434
diff changeset
  1358
	</h2><!-- Was 5.1.1 / #ldpc-get_non-member_props -->
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1359
	<p>The representation of a container
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1360
		that has many members will be large. There are several important
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1361
		cases where clients need to access only the non-member properties of
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1362
		the container. Since retrieving the whole container representation to
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1363
		get this information may be onerous for clients and cause unnecessary
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1364
		overhead on servers, it is desired to define a way to retrieve only
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1365
		the non-member property values. Defining for each LDPC a corresponding