ldp.html
author sspeiche
Tue, 17 Sep 2013 14:10:41 -0400
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parent 331 2e0bbaef0442
child 334 8e9ad2d0e512
permissions -rw-r--r--
Fixed vanishing section ref problem
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<!DOCTYPE html>
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<!-- 
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 Editor TODO:
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   - The word "canonical" is used twice in the document. Since we do not deal with URI 
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     canonicalization in the specification, I would remove the word and the meaning of 
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     the sentences is the same.
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   - section 4.6...respec is adding extra spaces to the sectionRefs
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	  carefully read section 4.2 .
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	  ->
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	  carefully read section 4.2.
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	  defined in section 4.8 .
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	  ->
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	  defined in section 4.8.
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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:membershipPredicate, 
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	  5.2.5.2 For a given triple T with a subject C of the LDPC and predicate of ldp:membershipPredicateInverse, 
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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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    <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:  "2013-08-19",
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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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          // 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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      };
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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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    </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 document 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 four rules of Linked Data [[LINKED-DATA]]:</p>
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	<p>1. Use URIs as names for things</p>
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	<p>2. Use HTTP URIs so that people can look up those
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		names</p>
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	<p>3. When someone looks up a URI, provide useful
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		information, using the standards (RDF*, <abbr title="SPARQL Protocol and RDF Query Language">SPARQL</abbr>)</p>
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	<p>4. Include links to other URIs, so that they can
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		discover more things</p>
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	<p>This specification discusses standard HTTP and RDF techniques and best practices that you 
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	should use, and anti-patterns you should avoid, when constructing clients and servers that 
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	read and write Linked Data resources.</p> 
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	<p>A special type of <a>Linked Data Platform Resource</a> is a 
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	<a>Container</a>.  Containers are very useful 
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	in building application models involving collections of homogeneous resources.  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, etc.  
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	This specification discusses how to work with containers.  Resources can be added to containers in 
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	several ways. As a special case, members can both be created and added to a container by overloading 
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	the POST operation (see <a href="#ldpc-HTTP_POST" class="sectionRef"></a>).</p>
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	<p>Another contribution of this specification is how to deal with large amounts of data.  
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	Depending on the server’s capabilities, a GET request on a Linked Data Platform Resource 
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	returns a set of pages and uses a convention to access any subsequent page (see <a href="#ldpr-Paging" class="sectionRef"></a>). </p>
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	<p>The intention of this document 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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</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><dfn>Linked Data Platform Resource</dfn> (<abbr title="Linked Data Platform Resource">LDPR</abbr>)</dt>
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	<dd>HTTP resource whose state is represented in RDF 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 Container</dfn> (<abbr title="Linked Data Platform Container">LDPC</abbr>)</dt>
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	<dd>An LDPR representing a collection of same-subject, same-predicate triples which is uniquely identified by a URI
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	that responds to client requests for creation, modification, and enumeration of its members.
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	<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>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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		The membership triples of a container all have the same
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		subject and predicate, and the objects of the membership triples identify
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		the container's members. 
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	<p></p></dd>
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	<dt><dfn>Membership subject</dfn></dt>
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	<dd>The subject 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>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>Page resource</dfn></dt>
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	<dd>A type of LDPR that is associated to another LDPR and whose representation 
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	includes a subset of the triples in the associated LDPR.
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	<p></p></dd>
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	<dt><dfn>Non-member resource</dfn></dt>
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	<dd>A 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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	<p></p></dd>
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	<dt><dfn>Resource inlining</dfn></dt>
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	<dd>
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		The practice of responding to a HTTP GET request made to a request URI <var>R<sub>0</sub></var> with
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		a representation that includes the state of <var>R<sub>0</sub></var>, the <em>entire</em> state of resources accessed through
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		<em>other</em> request URI(s) <var>R<sub>1</sub></var>...<var>R<sub>n</sub></var>, <em>and assertions</em> from the server 
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		identifying the additional resources whose
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		entire state has been provided.
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		<var>R<sub>1</sub></var>...<var>R<sub>n</sub></var> identify the inlined resource(s).
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		See <a href="#ldpr-inlining" class="sectionRef"></a> for details.
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	<p></p></dd>
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	<dt><dfn>Member inlining</dfn></dt>
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	<dd>A special case of <a title="Resource inlining">resource inlining</a>, where all members of a container on a given
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		page are inlined.  The response page may or may not include all of the container's members.
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		See <a href="#ldpc-inlining" class="sectionRef"></a> for details.
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	<p></p></dd>
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  </dl>
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<section id="conventions">
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<h2>Conventions Used in This Document</h2>
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	<p>Sample resource representations are provided in <code>text/turtle</code>
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		format [[TURTLE]].</p>
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	<p>Commonly used namespace prefixes:</p>
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	<pre style="word-wrap: break-word; white-space: pre-wrap;">	@prefix dcterms: &lt;http://purl.org/dc/terms/&gt;.
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	@prefix rdf:     &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt;.
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	@prefix rdfs:    &lt;http://www.w3.org/2000/01/rdf-schema#&gt;.
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	@prefix ldp:     &lt;http://www.w3.org/ns/ldp#&gt;.
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	@prefix xsd:     &lt;http://www.w3.org/2001/XMLSchema#&gt;.</pre>
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</section>
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</section>
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<section id='conformance'>
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<p>The status of the sections of Linked Data Platform 1.0 (this document) is as follows:</p>
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<ul>
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  <li>1. Introduction: <b>informative</b></li>
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  <li>2. Terminology: <b>normative</b></li>
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  <li>3. Conformance: <b>normative</b></li>
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  <li>4. Linked Data Platform Resources: <b>normative</b></li>
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  <li>5. Linked Data Platform Containers: <b>normative</b></li>
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  <li>6. HTTP Header Definitions: <b>normative</b></li>
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  <li>A. Acknowledgements: <b>informative</b></li> 
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  <li>B.1 Normative references: <b>normative</b></li>
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  <li>B.2 Informative references: <b>informative</b></li>
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</ul>
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<p>A conforming <b>LDP server</b> is an application program that processes HTTP 
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requests and generates HTTP responses that conform to the rules defined in <a href="#linked-data-platform-resources" class="sectionRef"></a>
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and <a href="#linked-data-platform-containers" class="sectionRef"></a>.</p>
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<p>A conforming <b>LDP client</b> is an application program that generates HTTP 
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requests and processes HTTP responses that conform to the rules defined in <a href="#linked-data-platform-resources" class="sectionRef"></a>
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and <a href="#linked-data-platform-containers" class="sectionRef"></a>.</p>
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</section>
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<section id="ldpr">
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<h1>Linked Data Platform Resources</h1>
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<section class="informative" id="ldpr-informative">
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<h2>Informative</h2>
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	<p>Linked Data Platform Resources (<dfn><abbr title="Linked Data Platform Resources">LDPRs</abbr></dfn>) are HTTP resources
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		that conform to the simple patterns and conventions in this section.
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		HTTP requests to access, modify, create or delete LDPRs are accepted
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		and processed by LDPR servers. Most LDPRs are domain-specific resources
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		that contain data for an entity in some domain, which could be
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		commercial, governmental, scientific, religious, or other.</p>
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	<p>Some of the rules defined in this document provide
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		clarification and refinement of the base Linked Data rules [[LINKED-DATA]];
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		others address additional needs.</p>
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	<p>The rules for Linked Data Platform Resources address basic
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		questions such as:</p>
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	<ul>
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		<li>What resource representations should be used?</li>
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		<li>How is optimistic collision detection handled for updates?</li>
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		<li>What should client expectations be for changes to linked-to resources,
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				such as type changes?</li>
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		<li>What can servers do to ease the burden of constraints for resource
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				creation?</li>
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		<li>How	do I GET the entries of a large resources broken up into pages?</li>
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	</ul>
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	<p>Additional informative guidance is available on the <a
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			href="http://www.w3.org/2012/ldp/wiki/Deployment_Guide"
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			class="external "
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			title="Deployment Guide"
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			rel="nofollow">working group's wiki</a> that addresses deployment
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		questions such as:</p>
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	<ul>
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		<li>What literal value types should be used?</li>
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		<li>Are there some typical vocabularies that should be reused?</li>
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	</ul>
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	<p>The following sections define the rules and
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		guidelines for use of LDPRs. This document also explains how to include
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		information about each member in the resource’s own representation
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		and how to paginate the resource representation if it gets too big.</p>
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</section>
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<section id="ldpr-general">
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<h2>General</h2>
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	<div id="ldpr-4_2_1" class="rule">4.2.1 LDPR servers MUST at least be HTTP/1.1 conformant servers [[!HTTP11]].</div>
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	<div id="ldpr-4_2_2" class="rule">4.2.2 LDPR servers MUST provide an RDF representation for LDPRs. 
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	The HTTP <code>Request-URI</code> of the LDPR is typically the subject of most triples in the response.
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	</div>
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   390
	<div id="ldpr-4_2_3" class="rule">4.2.3 LDPR servers MAY host a mixture of LDPRs and non-LDPRs. For example, it
12
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diff changeset
   391
		is common for LDPR servers to need to host binary or text resources
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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diff changeset
   392
		that do not have useful RDF representations.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   393
	</div>
69
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parents: 68
diff changeset
   394
222
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diff changeset
   395
	<div id="ldpr-4_2_4" class="rule">4.2.4 LDPRs 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,
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diff changeset
   396
		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,
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diff changeset
   397
		covered by other conformance rules.
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
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parents: 21
diff changeset
   398
	</div>
222
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diff changeset
   399
	<div id="ldpr-4_2_4_1" class="rule">4.2.4.1 LDPR predicates SHOULD use standard vocabularies such as Dublin Core
188
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   400
		[[!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,
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diff changeset
   401
		possible.
12
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parents:
diff changeset
   402
	</div>
222
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diff changeset
   403
	<div id="ldpr-4_2_5" class="rule">4.2.5 LDPR representations SHOULD have at least one <code>rdf:type</code>
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parents:
diff changeset
   404
		set explicitly.  This makes the representations much more useful to
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   405
		client applications that don’t support inferencing.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   406
	</div>
222
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parents: 221
diff changeset
   407
	<div id="ldpr-4_2_6" class="rule">4.2.6 LDPR servers MAY support standard representations beyond those
33
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
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parents: 21
diff changeset
   408
		necessary to conform to this specification. These
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   409
		could be other RDF formats, like N3 or NTriples, but non-RDF formats
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   410
		like HTML [[!HTML401]] and JSON [[!RFC4627]] would likely be common.
222
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diff changeset
   411
	</div>		
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
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diff changeset
   412
	<div id="ldpr-4_2_7" class="rule">4.2.7 LDPRs MAY be created, updated and deleted using methods not defined in
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parents:
diff changeset
   413
		this document, for example through application-specific means, SPARQL
33
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
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parents: 21
diff changeset
   414
		UPDATE, etc. [[!SPARQL-UPDATE]], as long as those methods do not conflict with this specification's 
3c8c101f3f97 2012-12-28 - Fixed Typos. Separated some compound rules like 4.1.5. Rewording for clarity: 4.1.10,
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parents: 21
diff changeset
   415
		normative requirements.
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parents:
diff changeset
   416
	</div>
222
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parents: 221
diff changeset
   417
	<div id="ldpr-4_2_8" class="rule">4.2.8 LDPR server responses MUST use entity tags (either weak or strong 
60
97516e223fb8 ISSUE-10 - 4.1.12 to be MUST use entity tags (either weak or strong ones)
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parents: 58
diff changeset
   418
ones) as response <code>ETag</code> header values.
12
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parents:
diff changeset
   419
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
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diff changeset
   420
	<div id="ldpr-4_2_9" class="rule">4.2.9 LDPR
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
   421
		servers SHOULD enable simple creation and modification of LDPRs.
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
   422
		It is
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
   423
		common for LDPR servers to put restrictions on representations – for
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
   424
		example, the range of <code>rdf:type</code> predicates, datatypes of
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
   425
		the objects of predicates, and the number of occurrences of predicates in an LDPR, but
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
   426
		servers SHOULD minimize those restrictions.  Enforcement of
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
   427
		more complex constraints will greatly restrict the set of clients
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
   428
		that can modify resources. For some server applications, excessive
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
   429
		constraints on modification of resources may be required.
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
   430
	</div>
222
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diff changeset
   431
	<div id="ldpr-4_2_10" class="rule">4.2.10 LDPR servers
149
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John Arwe
parents: 134
diff changeset
   432
		MUST advertise their LDP support by exposing a HTTP <code>Link</code> header
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   433
		with a target URI of <code>http://www.w3.org/ns/ldp/Resource</code>, and
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   434
		a link relation type of <code>type</code> (that is, <code>rel="type"</code>)
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   435
		in all responses to requests made 
192
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parents: 191
diff changeset
   436
		to the resource's HTTP <code>Request-URI</code>. This is notionally equivalent to the
221002315344 Removed 4.1.5 and various formatting issues
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parents: 191
diff changeset
   437
		presence of a <var>(subject-URI, <code>rdf:type</code>, <code>ldp:Resource</code>)</var> triple in the resource.
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   438
		The HTTP <code>Link</code> header is the method by which servers assert their support for the LDP specification in a way
149
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   439
		that clients can introspect dynamically at run-time.  Conservative clients should note that 
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
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parents: 221
diff changeset
   440
		<a href="#ldpr-4_2_3">a 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
   441
		that LDP support advertised on one HTTP <code>Request-URI</code> means that other 
221002315344 Removed 4.1.5 and various formatting issues
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parents: 191
diff changeset
   442
		resources on the same server are also LDPRs.  Each HTTP <code>Request-URI</code> needs to be 
149
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   443
		individually introspected by a conservative client, in the absence of outside information.
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   444
	</div>
222
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parents: 221
diff changeset
   445
	<div id="ldpr-4_2_11" class="rule">4.2.11 LDPR servers
152
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John Arwe
parents: 151
diff changeset
   446
		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
   447
		of content defined by LDP.  Other specifications built on top of LDP may require clients
188
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parents: 187
diff changeset
   448
		to implement inferencing [[!RDF-CONCEPTS]].  The practical implication is that all content defined by LDP
152
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John Arwe
parents: 151
diff changeset
   449
		must be explicitly represented. 
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   450
	</div>
224
39ca65760446 Removed 5.4.8.1 and added 4.2.12 to better handle base/rel URI
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diff changeset
   451
	<div id="ldpr-4_2_12" class="rule">4.2.12 LDPR servers MUST assign the default base-URI for [[!RFC3987]] relative-URI resolution to be the HTTP 
39ca65760446 Removed 5.4.8.1 and added 4.2.12 to better handle base/rel URI
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parents: 223
diff changeset
   452
		<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
   453
		in the creation of a new resource.
39ca65760446 Removed 5.4.8.1 and added 4.2.12 to better handle base/rel URI
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parents: 223
diff changeset
   454
	</div>
152
938e7d21cc10 issue-78 inferencing levels add 4.1.13
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parents: 151
diff changeset
   455
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parents:
diff changeset
   456
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   457
333
3c2aaaea1f73 Fixed vanishing section ref problem
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parents: 331
diff changeset
   458
<section id="ldpr-HTTP_GET">
3c2aaaea1f73 Fixed vanishing section ref problem
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parents: 331
diff changeset
   459
<h2>HTTP GET</h2>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
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parents: 221
diff changeset
   460
	<div id="ldpr-4_3_1" class="rule">4.3.1 LDPR servers MUST support the HTTP <code>GET</code> Method for LDPRs.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   461
	</div>
228
ec118c66c122 Moved 4.7.2 (from HEAD) to 4.3.2 (GET), shifted rest of GET section by one
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parents: 227
diff changeset
   462
	<div id="ldpr-4_3_2" class="rule">4.3.2 LDPR servers MUST support the HTTP response headers defined in 
ec118c66c122 Moved 4.7.2 (from HEAD) to 4.3.2 (GET), shifted rest of GET section by one
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parents: 227
diff changeset
   463
		<a href="#ldpr-HTTP_OPTIONS" class="sectionRef"></a>.
ec118c66c122 Moved 4.7.2 (from HEAD) to 4.3.2 (GET), shifted rest of GET section by one
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parents: 227
diff changeset
   464
	</div>
ec118c66c122 Moved 4.7.2 (from HEAD) to 4.3.2 (GET), shifted rest of GET section by one
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parents: 227
diff changeset
   465
	<div id="ldpr-4_3_3" class="rule">4.3.3 LDPR servers SHOULD provide a <code>text/turtle</code>
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
   466
		representation of the requested LDPR [[!TURTLE]].
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   467
	</div>
228
ec118c66c122 Moved 4.7.2 (from HEAD) to 4.3.2 (GET), shifted rest of GET section by one
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parents: 227
diff changeset
   468
	<div id="ldpr-4_3_4" class="rule">4.3.4 LDPR servers MAY 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
   469
		representations of the requested LDPR beyond those
232
c38de2977a87 Editorial changes from feedback from Sergio
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parents: 231
diff changeset
   470
		necessary to conform to this specification, using standard HTTP content negotiation ([[!HTTP11]] Section 12 - Content Negotiation). 
220
ff8b1635f35a ISSUE-53 4.2.3 changed MUST to SHOULD
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parents: 216
diff changeset
   471
		If the client does not indicate a preference, <code>text/turtle</code> SHOULD be returned.
69
0f9825dea52b Updating some simple formatting, reorganizing open issues and todos
sspeiche
parents: 68
diff changeset
   472
	</div>
228
ec118c66c122 Moved 4.7.2 (from HEAD) to 4.3.2 (GET), shifted rest of GET section by one
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parents: 227
diff changeset
   473
	<div id="ldpr-4_3_5" class="rule">4.3.5 In the absence of special knowledge of the application or domain, LDPR
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
   474
		clients MUST assume that any LDPR can have multiple values for <code>rdf:type</code>.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   475
	</div>
228
ec118c66c122 Moved 4.7.2 (from HEAD) to 4.3.2 (GET), shifted rest of GET section by one
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parents: 227
diff changeset
   476
	<div id="ldpr-4_3_6" class="rule">4.3.6 In the absence of special knowledge of the application or domain, LDPR
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   477
		clients MUST assume that the <code>rdf:type</code> values
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
   478
		of a given LDPR can change over time.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   479
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   480
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   481
333
3c2aaaea1f73 Fixed vanishing section ref problem
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parents: 331
diff changeset
   482
<section id="ldpr-HTTP_POST">
3c2aaaea1f73 Fixed vanishing section ref problem
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parents: 331
diff changeset
   483
<h2>HTTP POST</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   484
	<p>This specification adds no new requirements on HTTP <code>POST</code> for LDPRs 
200
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John Arwe
parents: 199
diff changeset
   485
		even when the LDPR supports that method.  This specification does not impose any
215
da72115eb40b Various updates per review of Raul
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parents: 213
diff changeset
   486
		new requirement to support that method, and [[!HTTP11]] makes it optional.</p>
da72115eb40b Various updates per review of Raul
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parents: 213
diff changeset
   487
	<p>Creation of LDPRs can be done via <code>POST</code> (<a href="#ldpc-HTTP_POST" class="sectionRef"></a>) or
da72115eb40b Various updates per review of Raul
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parents: 213
diff changeset
   488
		<code>PUT</code> (<a href="#ldpc-HTTP_PUT" class="sectionRef"></a>) to a LDPC, see those 
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   489
		sections for more details.</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   490
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   491
333
3c2aaaea1f73 Fixed vanishing section ref problem
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parents: 331
diff changeset
   492
<section id="ldpr-HTTP_PUT">
3c2aaaea1f73 Fixed vanishing section ref problem
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parents: 331
diff changeset
   493
<h2>HTTP PUT</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   494
	<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
   495
		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
   496
		new requirement to support that method, and [[!HTTP11]] makes it optional.</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   497
		
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
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parents: 221
diff changeset
   498
	<div id="ldpr-4_5_1" class="rule">4.5.1 If HTTP <code>PUT</code> is performed on an existing resource, LDPR servers MUST
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   499
		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
   500
		the entity representation in the body of the request. 
92
18891627c17f Fixed 2 old references to BPR
sspeiche
parents: 91
diff changeset
   501
		LDPR servers 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
   502
		and <code>dcterms:creator</code> if they are not under
2f8a2d58e65c ISSUE-11 - 4.4.1 Relaxed the MUST ignore dc:modified/creator to MAY
sspeiche
parents: 60
diff changeset
   503
		client control. Any LDPR servers that wish
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   504
		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
   505
		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
   506
		<code>PATCH</code>, not HTTP <code>PUT</code>.
61
2f8a2d58e65c ISSUE-11 - 4.4.1 Relaxed the MUST ignore dc:modified/creator to MAY
sspeiche
parents: 60
diff changeset
   507
	</div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   508
		
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   509
	<div id="ldpr-4_5_2" class="rule">4.5.2 LDPR clients 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
   510
		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
   511
		modifying a resource that has changed since the client last retrieved
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   512
		its representation. LDPR servers SHOULD require the HTTP <code>If-Match</code> header and HTTP <code>ETags</code>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   513
		to detect collisions. LDPR servers MUST respond with status code 412
122
14197f56039e Issue-74 resolution - 428 precondition required
John Arwe
parents: 120
diff changeset
   514
		(Condition Failed) if <code>ETag</code>s fail to match when there are no other
14197f56039e Issue-74 resolution - 428 precondition required
John Arwe
parents: 120
diff changeset
   515
		errors with the request [[!HTTP11]].  LDPR servers that require conditional requests MUST respond with status code 428
14197f56039e Issue-74 resolution - 428 precondition required
John Arwe
parents: 120
diff changeset
   516
		(Precondition Required) when the absence of a precondition is the only reason for rejecting the request [[!RFC6585]].
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   517
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   518
	<div id="ldpr-4_5_3" class="rule">4.5.3 LDPR clients SHOULD always assume that the set of predicates for a
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
   519
		resource of a particular type at an arbitrary server is open, in the
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   520
		sense that different resources of the same type may not all have the
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
   521
		same set of predicates in their triples, and the set of predicates that
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
   522
		are used in the state of any one resource is not limited to any pre-defined
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   523
		set.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   524
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   525
	<div id="ldpr-4_5_4" class="rule">4.5.4 LDPR clients SHOULD assume that an LDPR server could discard triples
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   526
		whose predicates the server does not recognize or otherwise chooses
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   527
		not to persist. In other words, LDPR servers MAY restrict themselves
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   528
		to a known set of predicates, but LDPR clients MUST NOT restrict themselves to a known set of predicates 
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   529
		when their intent is to perform a later HTTP <code>PUT</code> to update the resource.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   530
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   531
	<div id="ldpr-4_5_5" class="rule">4.5.5 An LDPR client MUST preserve all triples retrieved using HTTP <code>GET</code> that
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   532
		it doesn’t change whether it understands the predicates or not, when
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   533
		its intent is to perform an update using HTTP <code>PUT</code>.  The use of HTTP
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   534
		<code>PATCH</code> instead of HTTP <code>PUT</code> for update avoids this burden for clients
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   535
		[[RFC5789]].
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   536
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   537
	<div id="ldpr-4_5_6" class="rule">4.5.6 LDPR servers MAY choose to allow the creation of new resources using HTTP <code>PUT</code>.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   538
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   539
	<div id="ldpr-4_5_7" class="rule">4.5.7 LDPR servers 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
   540
		requiring detailed knowledge of server-specific constraints.  
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   541
		This is a consequence of the requirement to <a href="#ldpr-4_2_9">enable simple creation and modification</a> of LPDRs.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   542
	</div>		
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   543
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   544
		
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   545
<section id="ldpr-HTTP_DELETE">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   546
<h2>HTTP DELETE</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   547
	<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
   548
		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
   549
		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
   550
	<p>Additional requirements on HTTP <code>DELETE</code> of LDPRs within containers can be found in
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   551
	<a href="#ldpc-HTTP_DELETE" class="sectionRef"></a>.</p>
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
   552
		
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   553
	<div id="ldpr-4_6_1" class="rule">4.6.1 LDPR servers MUST remove the resource identified by the <code>Request-URI</code>.
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   554
		After a successful HTTP <code>DELETE</code>, a subsequent HTTP <code>GET</code> on the same
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   555
		<code>Request-URI</code> MUST result in a 404 (Not found) or 410 (Gone) status
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
   556
		code. Clients SHOULD note that servers MAY reuse a URI under some circumstances.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   557
	</div>
19
52d63fdf6ae8 ISSUE-24: Should DELETED resources remain deleted?
sspeiche
parents: 18
diff changeset
   558
	
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   559
	<div id="ldpr-4_6_2" class="rule">4.6.2 LDPR servers MAY alter the state of other resources as a result of an
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   560
		HTTP <code>DELETE</code> request. For example, it is acceptable for the server to
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   561
		remove triples from other resources whose subject or object is the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   562
		deleted resource. It is also acceptable and common for LDPR servers to
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   563
		not do this – behavior is server application specific.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   564
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   565
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   566
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   567
<section id="ldpr-HTTP_HEAD">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   568
<h2>HTTP HEAD</h2>
114
1629ff899e0e Issue-65 remove firstPage
John Arwe
parents: 113
diff changeset
   569
	<p>Note that certain LDP mechanisms, such as paging, rely on HTTP headers, and HTTP generally requires that
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   570
		<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
   571
		Thus, implementers should also carefully read sections <a href="#ldpr-HTTP_GET"></a> 
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   572
		and <a href="#ldpr-HTTP_OPTIONS"></a>.</p>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   573
	<div id="ldpr-4_7_1" class="rule">4.7.1 LDPR servers MUST support the HTTP <code>HEAD</code> method.</div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   574
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   575
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   576
<section id="ldpr-HTTP_PATCH">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   577
<h2>HTTP PATCH</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   578
	<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
   579
		only when the LDPR supports that method.  This specification does not impose any
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   580
		new requirement to support that method, and [[!HTTP11]] makes it optional.</p>	
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   581
	<div id="ldpr-4_8_1" class="rule">4.8.1 LDPR servers MAY implement HTTP <code>PATCH</code> to allow modifications,
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
   582
		especially partial replacement, of their resources [[!RFC5789]]. No
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   583
		minimal set of patch document formats is mandated by this document.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   584
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   585
	<div id="ldpr-4_8_2" class="rule">4.8.2 LDPR servers 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
   586
		requiring detailed knowledge of server-specific constraints.  
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   587
		This is a consequence of the requirement to <a href="#ldpr-4_2_9">enable simple creation and modification</a> of LPDRs.
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
   588
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   589
	<div id="ldpr-4_8_3" class="rule">4.8.3 LDPR servers SHOULD NOT allow clients to create new resources using <code>PATCH</code>.
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   590
		<a href="#ldpc-HTTP_POST"><code>POST</code> (to an LDPC)</a> and/or <a href="#ldpc-HTTP_PUT"><code>PUT</code></a> should be used as the standard way to create new LDPRs.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   591
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   592
	<div id="ldpr-4_8_4" class="rule">4.8.4 LDPR servers that support <code>PATCH</code> MUST
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   593
		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
   594
		requests, listing patch document media type(s) supported by the server.
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   595
	</div>
186
a3471f4667d8 Removed closed issues that required no new spec changes: 50, 56, 16, 19, 17
sspeiche
parents: 185
diff changeset
   596
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   597
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   598
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   599
<section id="ldpr-HTTP_OPTIONS">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   600
<h2>HTTP OPTIONS</h2>
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   601
	<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
   602
		beyond those in [[!HTTP11]].  Other sections of this specification, for example 
167
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   603
		<a href="#ldpr-HTTP_PATCH">PATCH</a>,
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   604
		<a href="#header-accept-post">Accept-Post</a>
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   605
		and <a href="#ldpr-paging-HTTP_OPTIONS">Paging</a>,
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   606
		add other requirements on <code>OPTIONS</code> responses.
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   607
		</p>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   608
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   609
	<div id="ldpr-4_9_1" class="rule">4.9.1 LDPR servers MUST support the HTTP <code>OPTIONS</code> method.</div>		
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   610
	<div id="ldpr-4_9_2" class="rule">4.9.2 LDPR servers MUST indicate their support for HTTP Methods by
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   611
		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
   612
		Method tokens in the HTTP response header <code>Allow</code>.
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   613
	</div>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   614
		
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   615
</section>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   616
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   617
<section id="ldpr-Paging">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   618
<h2>Paging</h2>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   619
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   620
<section class="informative" id="ldpr-PagingIntro">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   621
<h3>Introduction</h3>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   622
	<p>It sometimes happens that a
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   623
		resource is too large to reasonably transmit its representation in a
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   624
		single HTTP response. This will be especially true if the resource
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   625
		representation includes many triples both from its own representation and
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
   626
		from the representations of any <a title="Resource inlining">inlined resources</a>. A client could anticipate that a resource will be too large -
134
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parents: 130
diff changeset
   627
		for example, a client tool that accesses defects may assume that an
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   628
		individual defect will usually be of sufficiently constrained size
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   629
		that it makes sense to request all of it at once, but that the
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   630
		container of all the defects ever created will typically be too big.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   631
		Alternatively, a server could recognize that a resource that has been
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   632
		requested is too big to return in a single message.</p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   633
	<p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   634
		To address this problem, LDPRs should support a technique called Paging.  Paging can be achieved with a
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   635
		simple RDF pattern. For each resource, <code>&lt;resourceURL&gt;</code>, we define a new
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   636
		'first page' resource.  In this example, its URL will be <code>&lt;resourceURL&gt;?firstPage</code>,
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   637
		but servers are free to construct the URL as they see fit.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   638
		The triples in the representation of the each page
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
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parents: 194
diff changeset
   639
		are typically a subset of the triples in the resource
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   640
		- same subject, predicate and object.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   641
	</p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   642
	<p>LDPR servers may respond to requests for a
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   643
		resource by redirecting the client to the first page resource –
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   644
		using a 303 “See Other” redirect to the actual URL for the page
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   645
		resource.  Alternatively, clients may introspect the resource for a paged representation 
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   646
		and use it preferentially when available.</p>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   647
	<p>
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   648
		Looking at an example resource representing Example Co.'s customer
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   649
		relationship data, we’ll split the response across two pages.  
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   650
		To find the URL of the first page, the client makes a <code>OPTIONS</code> request
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   651
		to the resource's URL, and in the response looks for a HTTP <code>Link</code>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   652
		header with <code>rel="first"</code>; the target URI in the header is the URL
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   653
		of the first page resource.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   654
		The client then 
215
da72115eb40b Various updates per review of Raul
sspeiche
parents: 213
diff changeset
   655
		requests the first page as <code>http://example.org/customer-relations?firstPage</code>:
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   656
	</p>
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   657
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   658
<pre class="example"># The following is the representation of
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   659
#    http://example.org/customer-relations?firstPage
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   660
@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)
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parents: 130
diff changeset
   661
@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
   662
@prefix foaf: &lt;http://xmlns.com/foaf/0.1/&gt;.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   663
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   664
@prefix o: &lt;http://example.org/ontology/&gt;.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   665
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   666
&lt;http://example.org/customer-relations&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   667
   a o:CustomerRelations;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   668
   dcterms:title "The customer information for Example Co.";
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   669
   o:client &lt;client#JohnZSmith&gt;, &lt;client#BettyASmith&gt;, &lt;client#JoanRSmith&gt;. 
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   670
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   671
&lt;http://example.org/customer-relations?firstPage&gt;
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   672
   a ldp:Page;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   673
   ldp:pageOf &lt;http://example.org/customer-relations&gt;;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   674
   ldp:nextPage &lt;http://example.org/customer-relations?p=2&gt;.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   675
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   676
&lt;client#JohnZSmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   677
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   678
   o:status o:ActiveCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   679
   foaf:name "John Z. Smith".
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   680
&lt;client#BettyASmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   681
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   682
   o:status o:PreviousCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   683
   foaf:name "Betty A. Smith".
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   684
 &lt;client#BettyASmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   685
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   686
   o:status o:PotentialCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   687
   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
   688
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   689
	<p>
232
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   690
		The server determines the size of the pages using application specific methods not defined
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   691
		within this specificiation. Note also, the actual name for the query parameter (such as ?p=2) is also
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   692
		defined by the server and not this specification.
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   693
	</p>
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   694
	<p>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   695
		The following example is the result of retrieving the representation
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   696
		for the next page:
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   697
	</p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   698
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   699
<pre class="example"># The following is the representation of
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   700
#  http://example.org/customer-relations?p=2
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   701
@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
   702
@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
   703
@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
   704
@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
   705
@prefix o: &lt;http://example.org/ontology/&gt;.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   706
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   707
&lt;http://example.org/customer-relations&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   708
   o:client &lt;client#GlenWSmith&gt;, &lt;client#AlfredESmith&gt;. 
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   709
 
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   710
&lt;http://example.org/customer-relations?p=2&gt;
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   711
   a ldp:Page;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   712
   ldp:pageOf &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
   713
   ldp:nextPage rdf:nil.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   714
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   715
&lt;client#GlenWSmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   716
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   717
   o:status o:ActiveCustomer, o:GoldCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   718
   foaf:name "Glen W. Smith".
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   719
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   720
&lt;client#AlfredESmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   721
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   722
   o:status o:ActiveCustomer, o:BronzeCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   723
   foaf:name "Alfred E. Smith".</pre>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   724
	<p>
215
da72115eb40b Various updates per review of Raul
sspeiche
parents: 213
diff changeset
   725
		In this example, there are only two customers provided in the
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   726
		final page.  To indicate this is the last page, a value of <code>rdf:nil</code> is used for the <code>ldp:nextPage</code>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   727
		predicate of the page resource.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   728
	</p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   729
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   730
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   731
<section id="ldpr-PagingGET">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   732
<h3>HTTP GET</h3>
215
da72115eb40b Various updates per review of Raul
sspeiche
parents: 213
diff changeset
   733
<p>In addition to the requirements set forth in <a href="#ldpr-HTTP_GET" class="sectionRef"></a> on HTTP <code>GET</code>, LDPR servers that support paging must also follow the requirements in this section</p>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   734
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   735
	<div id="ldpr-pagingGET-1" class="rule">4.10.2.1 LDPR servers SHOULD allow clients to retrieve large LDPRs in
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   736
		pages. In responses to <code>GET</code> requests with an LDPR as the <code>Request-URI</code>, 
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   737
		LDPR servers that support paging SHOULD provide an HTTP <code>Link</code>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   738
		header whose target URI is the first page resource, and whose link relation type is <code>first</code> [[!RFC5988]]. 
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   739
		This is the mechanism by which clients discover the URL of the first page.  If no such <code>Link</code>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   740
		header is present, then conservative clients will assume that the LDPR does not support paging.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   741
		For example, if there is a LDPR with URL <code>&lt;resourceURL&gt;</code> that supports paging and whose
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   742
		first page URL is <code>&lt;resourceURL&gt;?theFirstPage</code>, then the corresponding link header
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   743
		would be <code>Link: &lt;?theFirstPage&gt;;rel="first"</code>.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   744
		The representation for any page, including the first, will include
201
45d0825d4dfc fix broken sectionRef to paging
John Arwe
parents: 200
diff changeset
   745
		the URL for the next page. See <a href="#ldpr-Paging" class="sectionRef"></a> for additional details.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   746
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   747
	<div id="ldpr-pagingGET-2" class="rule">4.10.2.2 LDPR servers MAY split the response representation of any LDPR. 
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   748
		This is known as
201
45d0825d4dfc fix broken sectionRef to paging
John Arwe
parents: 200
diff changeset
   749
		server-initiated paging. See <a href="#ldpr-Paging" class="sectionRef"></a> for
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   750
		additional details.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   751
	</div>
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   752
	<div id="ldpr-pagingGET-3" class="rule">4.10.2.3 LDPR servers that initiate paging SHOULD respond to requests for a LDPR
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   753
		by redirecting the client to the first page resource using a <code>303 See
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   754
		Other</code> response with an HTTP <code>Location</code> header providing the first page resource URL.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   755
	</div>
232
c38de2977a87 Editorial changes from feedback from Sergio
sspeiche
parents: 231
diff changeset
   756
	<div id="ldpr-pagingGET-4" class="rule">4.10.2.4 LDPR servers that support paging MUST include a representation for the page resource.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   757
	</div>
227
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   758
	<div id="ldpr-pagingGET-4_1" class="rule">4.10.2.4.1 The page resource representation MUST have one triple with the subject
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   759
		of the page, predicate of <code>ldp:nextPage</code> and
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   760
		object being the URL for the subsequent page.
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   761
<pre class="example">&lt;http://example.org/customer-relations?firstPage&gt;
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   762
    ldp:nextPage  &lt;http://example.org/customer-relations?p=2&gt; .</pre>
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   763
	</div>
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   764
	<div id="ldpr-pagingGET-4_2" class="rule">4.10.2.4.2 The last page resource representation MUST have one triple with the subject of the 
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   765
	    last page, predicate of <code>ldp:nextPage</code> and object being <code>rdf:nil</code>.
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   766
<pre class="example">&lt;http://example.org/customer-relations?p=2&gt;
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   767
    ldp:nextPage  rdf:nil .</pre>	    
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   768
	</div>
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   769
	<div id="ldpr-pagingGET-4_3" class="rule">4.10.2.4.3 The page resource representation SHOULD have one triple to indicate its
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   770
		type, whose subject is the URL of the page, whose predicate is <code>rdf:type</code> and object is <code>ldp:Page</code>.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   771
		It also SHOULD have 1 triple to indicate the resource it is paging,
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   772
		whose  subject is the URL of the page, predicate is <code>ldp:pageOf</code>,
206
812d3e1f3412 fix LDPC/LDPR typo
John Arwe
parents: 202
diff changeset
   773
		and object is the URL of the LDPR.
227
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   774
<pre class="example">&lt;http://example.org/customer-relations?firstPage&gt;
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   775
    rdf:type    ldp:Page;
1bb410ec95dd Moved 4.10.2.5->4.10.2.4.3,4.10.2.6->4.10.2.4.1,4.10.2.7->4.10.2.4.2 and added samples
sspeiche
parents: 226
diff changeset
   776
    ldp:pageOf  &lt;http://example.org/customer-relations&gt;.</pre>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   777
	</div>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   778
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   779
333
3c2aaaea1f73 Fixed vanishing section ref problem
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parents: 331
diff changeset
   780
<section id="ldpr-paging-HTTP_OPTIONS">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   781
<h3>HTTP OPTIONS</h3>
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   782
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   783
<div id="ldpr-4_10_3_1" class="rule">4.10.3.1 LDPR servers MUST indicate their support for client-initiated paging by
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   784
	responding to a HTTP <code>OPTIONS</code> request on the LDPR’s URL with the HTTP
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   785
	response header for link relations using the header name of <code>Link</code> and link relation type <code>first</code> [[!RFC5988]].
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   786
</div>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   787
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   788
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   789
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   790
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   791
<section id="ldpr-inlining">
3c2aaaea1f73 Fixed vanishing section ref problem
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parents: 331
diff changeset
   792
<h2>Resource Inlining: Representing Multiple Resources in a Response</h2>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   793
184
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   794
	<div class="atrisk"><p class="atrisktext">Feature At Risk</p>
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   795
		<p>The LDP Working Group proposes incorporation of the features described in this section.</p>
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   796
		<ul>
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   797
		<li>The addition of <a>resource inlining</a> to save application latency
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   798
		and server/network load in controlled environments.</li>
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   799
		</ul>
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   800
		<p>Feedback, both positive and negative, is invited by sending email to the mailing list 
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   801
		in <a href="#sotd">Status of This Document</a>.</p>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   802
	</div>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   803
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   804
<section class="informative" id="ldpr-InliningIntro">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   805
<h3>Introduction</h3>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   806
	<p>Servers whose resources are relatively granular may wish to optimistically provide more information
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   807
		in a response than what the client actually requested, in order to reduce the average number of client
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   808
		application HTTP flows.  LDP provides some basic building blocks to enable
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   809
		this, that implementations can re-use to build complete solutions, and they may serve as 
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   810
		complete solutions in applications with sufficient controls on resource content.
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   811
		These building blocks are <a>resource inlining</a> and <a>member inlining</a>.
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   812
	</p>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   813
	
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   814
	<p>LDP does not provide clients with any way to detect whether or not the server is capable of 
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   815
		inlining (all its resources or any specific resource), nor does it provide clients 
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   816
		with any way to influence which (if any) resources are inlined in any given response.
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   817
	</p>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   818
	
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   819
	<p>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   820
		Servers can return extra triples on any response, but fail to meet the definition of <a>resource inlining</a>, 
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   821
		by either returning a subset of the other resource(s) triples or by failing to assert that
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   822
		all triples were included (even through they were).  Clients might still find the extra
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   823
		information useful, but the only way for clients to be sure they had all available 
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   824
		information would be to make a HTTP <code>GET</code> request against all the other resource(s).
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   825
		In some applications, knowing that these requests are unnecessary saves significant latency
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   826
		and server/network load.
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   827
	</p>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   828
</section> <!-- h3 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   829
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   830
<section class="informative" id="ldpr-InliningWarnings">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   831
<h3>Use with Care</h3>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   832
	<p>The building blocks LDP provides can only be safely used if certain assumptions hold.  
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   833
	Said another way, resource inlining solves a subset of scenarios, not all scenarios in the general case &mdash;
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   834
	so if you care about any of the following in a given application, your server should avoid returning
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   835
	<em>any</em> triples beyond those found at the HTTP <code>Request-URI</code>.
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   836
	</p>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   837
	<ul>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   838
	<li><p>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   839
		Provenance is lost: because RDF graphs from multiple HTTP resources are merged in the
178
0ec347702232 issue-58 proofing nits
John Arwe
parents: 176
diff changeset
   840
		response without attributing each statement to its originating graph (i.e. without quotation),
0ec347702232 issue-58 proofing nits
John Arwe
parents: 176
diff changeset
   841
		it is impossible for a client to reliably know which
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   842
		triples came from which HTTP resource(s).  A general solution allowing quotation is
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   843
		RDF Datasets; that is expected to be standardized independently, and can be used in these cases
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   844
		once it is available.
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   845
	</p></li>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   846
	<li><p>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   847
		The response may contain contradictions that are trivially obvious (or subtle), and those may or 
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   848
		may not be a problem at the application level.  For a trivial example, two triples may have
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   849
		identical subjects and predicates but different objects: "75F is too hot"; "75F is too cold".
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   850
		Again, quotation via RDF Datasets (or any equivalent mechanism) is believed to provide a 
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   851
		long term solution once standardized.
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   852
	</p></li>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   853
	</ul>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   854
</section> <!-- h3 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   855
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   856
<section id="ldpr-InliningGET">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   857
<h3>HTTP GET</h3>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   858
	<p>In addition to the requirements set forth in other sections, 
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   859
		LDPR servers that support <a>resource inlining</a>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   860
		must also follow the requirements in this section.</p>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   861
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   862
	<div id="ldpr-4_11_3_1" class="rule">4.11.3.1 LDPR servers that support <a>resource inlining</a> MUST 
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   863
		include a <code>ldp:Page</code> resource in the representation describing the set of inlined resources, 
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   864
		whether or not the representation contains subsequent pages.  The <code>ldp:Page</code> resource conceptually contains
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   865
		metadata about the representation; it is usually not part of the HTTP resource's state, and its presence does not indicate that
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   866
		the LDPR server supports <a href="#ldpr-Paging">paging</a> in general.  
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   867
		LDPR servers that include the <code>ldp:Page</code> resource for inlining and also support 
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   868
		paging MUST use the same <code>ldp:Page</code> resource for the triples required by both,
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   869
		in order to minimize client code complexity.
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   870
		The <code>ldp:Page</code> resource's triples are the LDP-defined means by which the servers communicate to LDP clients 
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   871
		the set of HTTP resources whose state is included in a representation, allowing clients to avoid HTTP <code>GET</code>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   872
		requests for them.
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   873
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   874
222
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   875
	<div id="ldpr-4_11_3_2" class="rule">4.11.3.2 LDPR servers that support <a>resource inlining</a> MUST 
1db581afd1ec Added informative section 4.1 , therefore shifting all sections by one 4.1->4.2, etc
sspeiche
parents: 221
diff changeset
   876
		include the <code>ldp:Page</code> resource described in <a href="#ldpr-4_11_3_1">section 4.11.3.1</a> 
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   877
		one triple for each inlined resource, 
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   878
		whose subject is the <code>ldp:Page</code> resource URI,
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   879
		whose predicate is <code>ldp:inlinedResource</code>, and
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   880
		whose object is the HTTP <code>Request-URI</code> of an inlined resource [[!HTTP11]].
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   881
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   882
237
6871b9ac5339 Fixed various link checker bugs
sspeiche
parents: 235
diff changeset
   883
	<div id="ldpr-4_11_3_3" class="rule">4.11.3.3 LDPR clients SHOULD avoid making HTTP <code>GET</code> requests
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   884
		against any resource whose HTTP <code>Request-URI</code> is the object of a triple of the form 
237
6871b9ac5339 Fixed various link checker bugs
sspeiche
parents: 235
diff changeset
   885
		described in <a href="#ldpr-4_11_3_2">section 4.11.3.2</a>, unless there are application-specific
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   886
		reasons for doing so.  Clients should note that by the time the representation is received, the actual state
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   887
		of any inlined resource(s) may have changed due to subsequent requests.
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   888
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   889
237
6871b9ac5339 Fixed various link checker bugs
sspeiche
parents: 235
diff changeset
   890
	<div id="ldpr-4_11_3_4" class="rule">4.11.3.4 LDPR clients MUST NOT assume that LDPR representations
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   891
		lacking a <code>ldp:Page</code> resource or lacking the triple
237
6871b9ac5339 Fixed various link checker bugs
sspeiche
parents: 235
diff changeset
   892
		described in <a href="#ldpr-4_11_3_2">section 4.11.3.2</a> contain all the triples for any resource(s)
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   893
		listed in the representation whose HTTP <code>Request-URI</code> differs from 
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   894
		the HTTP <code>Request-URI</code> used by the client.  
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   895
		The representation might in fact contain all such triples, or some
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   896
		subset of them, and that might or might not be completely adequate for the client's intended usage, but
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   897
		an LDP client has no way to discern from such a representation which interpretation is accurate.
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   898
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   899
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   900
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   901
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   902
</section> <!-- h2 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   903
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   904
</section> <!-- h1 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   905
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   906
<section id="ldpc">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   907
<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
   908
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   909
<section class="informative" id="ldpc-informative">		
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
   910
<h2>Informative</h2>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   911
	<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
   912
		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
   913
		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
   914
		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
   915
		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
   916
		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
   917
		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
   918
		are:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   919
	<ol>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   920
		<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
   921
		<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
   922
		<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
   923
		<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
   924
		<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
   925
	</ol>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   926
	<p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   927
		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
   928
		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
   929
		defined by a set of triples in its representation (and state) called
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   930
		the membership triples. The membership triples of a container all
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   931
		have the same subject and predicate – the objects of the membership
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   932
		triples define the members of the container. The subject of the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   933
		membership triples is called the membership subject and the predicate
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   934
		is called the membership predicate. In the simplest cases, the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   935
		membership subject will be the LDPC resource itself, but it does not
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   936
		have to be. The membership predicate is also variable and will often
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   937
		be a predicate from the server application vocabulary or the <code>rdfs:member</code> predicate.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   938
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   939
	<p>This document includes a set of guidelines for
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   940
		using POST to create new resources and add 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
   941
		members of a container. It goes on to explain how to learn about a set of related
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
   942
		resources, they may have been created using POST or through other means.
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
   943
		It also defines behavior when POST created resources are deleted, to clean up
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
   944
		container membership, and deleting containers removes membership information and
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
   945
		possibly perform 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
   946
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   947
	<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
   948
		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
   949
		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
   950
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   951
<pre class="example"># The following is the representation of
74
30624f0a7534 Adding trailing '/' on Container URLs to help with readability based on WG suggestion
sspeiche
parents: 73
diff changeset
   952
#    http://example.org/container1/
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
   953
<!-- @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
   954
# @base &lt;http://example.org/container1/&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   955
@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
   956
@prefix rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt;.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   957
@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
   958
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
   959
&lt;&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   960
   a ldp:Container;
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
   961
   ldp:membershipSubject &lt;&gt; ;
130
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
   962
   ldp:membershipPredicate rdfs:member;
210
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
   963
   ldp:membershipObject ldp:MemberSubject;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   964
   dcterms:title "A very simple container";
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
   965
   rdfs:member &lt;member1&gt;, &lt;member2&gt;, &lt;member3&gt;.</pre>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   966
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   967
	<p>This example is very straightforward - the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   968
			membership predicate is <code>rdfs:member</code> and the membership subject is the container
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   969
			itself. A POST to this container will create a new resource
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   970
			and add it to the list of members by adding a new membership triple
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   971
			to the container.</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   972
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   973
	<p>Sometimes it is useful to use a subject
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   974
	other than the container itself as the membership subject and to use
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   975
	a predicate other than <code>rdfs:member</code> as the membership predicate. Let's
88
a02636c16f05 Fixed typo in new text
sspeiche
parents: 87
diff changeset
   976
	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
   977
			
233
37842c77d995 Fixed dup id problem in example
sspeiche
parents: 232
diff changeset
   978
<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
   979
#   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
   980
<!-- @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
   981
# @base &lt;http://example.org/netWorth/nw1/&gt;
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   982
@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
   983
@prefix o: &lt;http://example.org/ontology/&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   984
&lt;&gt;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   985
   a o:NetWorth;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   986
   o:netWorthOf &lt;http://example.org/users/JohnZSmith&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   987
   o:asset 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   988
      &lt;assetContainer/a1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   989
      &lt;assetContainer/a2&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   990
   o:liability 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   991
      &lt;liabilityContainer/l1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   992
      &lt;liabilityContainer/l2&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   993
      &lt;liabilityContainer/l3&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   994
</pre>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   995
	<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
   996
	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
   997
	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
   998
	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
   999
	for them to assist with managing these, this is done by associating containers with them as 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1000
	illustrated below:
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1001
	</p>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1002
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1003
<pre class="example" id="ldpc-ex-membership-full"># The following is an elaborated representation of
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1004
#   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
  1005
<!-- @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
  1006
# @base &lt;http://example.org/netWorth/nw1/&gt;
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1007
@prefix ldp: &lt;http://www.w3.org/ns/ldp#&gt;.
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1008
@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
  1009
@prefix o: &lt;http://example.org/ontology/&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1010
&lt;&gt;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1011
   a o:NetWorth;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1012
   o:netWorthOf &lt;http://example.org/users/JohnZSmith&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1013
   o:asset 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1014
      &lt;assetContainer/a1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1015
      &lt;assetContainer/a2&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1016
   o:liability 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1017
      &lt;liabilityContainer/l1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1018
      &lt;liabilityContainer/l2&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1019
      &lt;liabilityContainer/l3&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1020
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1021
&lt;assetContainer/&gt;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1022
   a ldp:Container;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1023
   dcterms:title "The assets of JohnZSmith";
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1024
   ldp:membershipSubject &lt;&gt;;
210
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1025
   ldp:membershipPredicate o:asset;
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1026
   ldp:membershipObject ldp:MemberSubject.
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1027
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1028
&lt;liabilityContainer/&gt;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1029
   a ldp:Container;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1030
   dcterms:title "The liabilities of JohnZSmith";
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1031
   ldp:membershipSubject &lt;&gt;;
210
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1032
   ldp:membershipPredicate o:liability;
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1033
   ldp:membershipObject ldp:MemberSubject.
87
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1034
</pre>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1035
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1036
	<p>The essential structure of the container is
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1037
	the same, but in this example, the membership subject is not the
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1038
	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
  1039
	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
  1040
	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
  1041
	asset and add it to the list of	members by adding a new membership triple
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1042
	to the container. You might wonder why
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1043
	<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
  1044
	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
  1045
	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
  1046
	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
  1047
	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
  1048
	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
  1049
	resources allows both assets and liabilities to be created.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1050
	</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1051
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1052
<pre class="example" id="ldpc-ex-membership-subj"># The following is the representation of
74
30624f0a7534 Adding trailing '/' on Container URLs to help with readability based on WG suggestion
sspeiche
parents: 73
diff changeset
  1053
#   http://example.org/netWorth/nw1/assetContainer/
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
  1054
<!-- @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
  1055
# @base &lt;http://example.org/netWorth/nw1/assetContainer/&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1056
@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
  1057
@prefix o: &lt;http://example.org/ontology/&gt;.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1058
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1059
&lt;&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1060
   a ldp:Container;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1061
   ldp:membershipSubject &lt;http://example.org/netWorth/nw1&gt;;
210
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1062
   ldp:membershipPredicate o:asset;
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1063
   ldp:membershipObject ldp:MemberSubject.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1064
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1065
&lt;http://example.org/netWorth/nw1&gt;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1066
   a o:NetWorth;
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1067
   o:asset &lt;a1&gt;, &lt;a2&gt;.</pre>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1068
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1069
	<p>In this example, clients cannot simply guess
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1070
			which resource is the membership subject and which predicate is the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1071
			membership predicate, so the example includes this information in
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1072
			triples whose subject is the LDPC resource itself.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1073
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1074
	
191
ab6b24fcb2b6 Fixed various section marking issues with informative
sspeiche
parents: 190
diff changeset
  1075
	<div id="ldpc-member_data" class="rule informative">5.1.1 Container Member Information</div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1076
	<p>In many – perhaps most – applications
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1077
		involving containers, it is desirable for the client to be able to
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1078
		get information about each container member without having to do a
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1079
		GET on each one. LDPC allows servers to include this information
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1080
		directly in the representation of the container. The server decides
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1081
		the amount of data about each member that is provided. Some common
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1082
		strategies include providing a fixed number of standard properties,
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1083
		or providing the entire RDF representation of each member resource,
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1084
		or providing nothing. The server application domain and its use-cases
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1085
		will determine how much information is required.</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1086
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1087
	<p>Continuing on from the net worth
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1088
		example, there will be additional triples for the member resources
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1089
		(assets) in the representation:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1090
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1091
<pre class="example"># The following is the representation of
74
30624f0a7534 Adding trailing '/' on Container URLs to help with readability based on WG suggestion
sspeiche
parents: 73
diff changeset
  1092
#	 http://example.org/netWorth/nw1/assetContainer/
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
  1093
<!-- @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
  1094
# @base &lt;http://example.org/netWorth/nw1/assetContainer/&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1095
@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
  1096
@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
  1097
@prefix o:       &lt;http://example.org/ontology/&gt;.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1098
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1099
&lt;&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1100
   a ldp:Container;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1101
   dcterms:title "The assets of JohnZSmith";
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1102
   ldp:membershipSubject &lt;http://example.org/netWorth/nw1&gt;;
210
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1103
   ldp:membershipPredicate o:asset;
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1104
   ldp:membershipObject ldp:MemberSubject.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1105
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1106
&lt;http://example.org/netWorth/nw1&gt;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1107
   a o:NetWorth;
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1108
   o:asset &lt;a1&gt;, &lt;a3&gt;, &lt;a2&gt;.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1109
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1110
&lt;a1&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1111
   a o:Stock;
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
  1112
   o:value 10000 .
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1113
&lt;a2&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1114
   a o:Bond;
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
  1115
   o:value 20000 .
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1116
&lt;a3&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1117
   a o:RealEstateHolding;
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
  1118
   o:value 300000 .</pre>
185
58f49a8417b8 ISSUE-51 Added how a LDPR can show which LDPC is it in
sspeiche
parents: 184
diff changeset
  1119
	<p>In a similar manner, when the representation for the resource of asset <var>.../&lt;a1&gt;</var> is returned a 
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1120
	server may include the membership triple of the form <var>(.../nw1, o:asset, .../a1).</var></p>
102
04e3e77e4e78 Added open issues 50, 51, 55, 56, 57, 58, 59
Ashok Malhotra <Ashok.Malhotra@Oracle.com>
parents: 99
diff changeset
  1121
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1122
	<div id="ldpc-get_non-member_props" class="rule">5.1.2 Retrieving Only Non-member Properties
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1123
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1124
	<p>The representation of a container
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1125
		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
  1126
		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
  1127
		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
  1128
		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
  1129
		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
  1130
		the non-member property values. Defining for each LDPC a corresponding
120
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1131
		resource, called the “<a>non-member resource</a>”, whose state is a subset
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1132
		of the state of the container, does this.</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1133
	<p>The example listed here only show
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1134
		a simple case where only a few simple non-member properties are
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1135
		retrieved. In real world situations more complex cases are likely, such as those that add other predicates to
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1136
		containers, for example providing validation information and
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1137
		associating SPARQL endpoints. [[SPARQL-QUERY]]</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1138
	<p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1139
		Here is an example requesting the non-member properties of a
120
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1140
		container identified by the URL <code>http://example.org/container1/</code>.
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1141
		In this case, the non-member resource is identified by the URL 
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1142
		<code>http://example.org/container1?non-member-properties</code>:
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1143
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1144
<p>Request:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1145
<pre class="example">GET /container1?non-member-properties HTTP/1.1
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1146
Host: example.org
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1147
Accept: text/turtle; charset=UTF-8
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1148
</pre>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1149
<p>Response:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1150
<pre class="example">HTTP/1.1 200 OK
13
eea17080fdf2 Minor typo fix and some notes
sspeiche
parents: 12
diff changeset
  1151
Content-Type: text/turtle; charset=UTF-8
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1152
ETag: "_87e52ce291112"
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1153
Content-Length: 325
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1154
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1155
@prefix rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt;.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1156
@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
  1157
@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
  1158
74
30624f0a7534 Adding trailing '/' on Container URLs to help with readability based on WG suggestion
sspeiche
parents: 73
diff changeset
  1159
&lt;http://example.org/container1/&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1160
   a ldp:Container;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1161
   dcterms:title "A Linked Data Platform Container of Acme Resources";
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
  1162
   ldp:membershipSubject &lt;http://example.org/container1/&gt;;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1163
   ldp:membershipPredicate rdfs:member;
210
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1164
   ldp:membershipObject ldp:MemberSubject;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1165
   dcterms:publisher &lt;http://acme.com/&gt;.</pre>
120
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1166
   
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1167
	<p>While the same non-member resource could be used to update the non-member properties via PUT,
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1168
		LDP recommends using PATCH for this purpose.</p>
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1169
215
da72115eb40b Various updates per review of Raul
sspeiche
parents: 213
diff changeset
  1170
	<div id="ldpc-ordering" class="rule">5.1.3 Ordering</div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1171
	<p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1172
		There are many cases where an ordering of the members of the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1173
		container is important. LDPC does not provide any particular support
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1174
		for server ordering of members in containers, because any client can
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1175
		order the members in any way it chooses based on the value of any
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1176
		available property of the members. In the example below, the value of
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1177
		the <code>o:value</code> predicate is present for each
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1178
		member, so the client can easily order the members according to the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1179
		value of that property. In this way, LDPC avoids the use of RDF
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1180
		constructs like Seq and List for expressing order.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1181
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1182
	<p>
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1183
		Order becomes more important for LDPC servers when containers are
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1184
		paginated. If the server does not respect ordering when constructing
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1185
		pages, the client would be forced to retrieve all pages before
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1186
		sorting the members, which would defeat the purpose of pagination. 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1187
		In cases where ordering is important, an LDPC server exposes all the
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1188
		members on a page with the proper sort order with relation to all 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1189
		members on the next and previous pages.
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1190
		When the sort is ascending, all the members on a current page have a 
311
02a6e18eaec6 tweak informative text around sort order in response to offline comments. the old language implied pages were strictly ordered, which ignores the case of equal sort ranked members that fill/span several pages.
John Arwe
parents: 309
diff changeset
  1191
		sort order no lower than all members on the previous page and 
02a6e18eaec6 tweak informative text around sort order in response to offline comments. the old language implied pages were strictly ordered, which ignores the case of equal sort ranked members that fill/span several pages.
John Arwe
parents: 309
diff changeset
  1192
		sort order no higher than all the members on the next page; 
02a6e18eaec6 tweak informative text around sort order in response to offline comments. the old language implied pages were strictly ordered, which ignores the case of equal sort ranked members that fill/span several pages.
John Arwe
parents: 309
diff changeset
  1193
		that is, it proceeds from low to high, but keep in mind that several 
02a6e18eaec6 tweak informative text around sort order in response to offline comments. the old language implied pages were strictly ordered, which ignores the case of equal sort ranked members that fill/span several pages.
John Arwe
parents: 309
diff changeset
  1194
		consecutive pages might have members whose sort criteria are equal. 
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1195
		When the sort is descending, the opposite order is used. 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1196
		Since more than one value may be used to sort members, 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1197
		the LDPC specification allows servers to assert the ordered list
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1198
		of sort criteria used to sort the members, using the 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1199
		<code>ldp:containerSortCriteria</code> relation.
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1200
		Each member of the ordered list exposes one <code>ldp:containerSortCriterion</code>, 
212
97ac8b356958 Fixed a couple typos in 5.1.4
sspeiche
parents: 211
diff changeset
  1201
		consisting of a <code>ldp:containerSortOrder</code>, 
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1202
		<code>ldp:containerSortPredicate</code>, and 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1203
		optionally a <code>ldp:containerSortCollation</code>.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1204
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1205
	<p>Here is an example container described
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1206
		previously, with representation for ordering of the assets:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1207
<pre class="example"># The following is the ordered representation of
74
30624f0a7534 Adding trailing '/' on Container URLs to help with readability based on WG suggestion
sspeiche
parents: 73
diff changeset
  1208
#   http://example.org/netWorth/nw1/assetContainer/
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
  1209
<!-- @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
  1210
# @base &lt;http://example.org/netWorth/nw1/assetContainer/&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1211
@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
  1212
@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
  1213
@prefix o: &lt;http://example.org/ontology/&gt;.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1214
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1215
&lt;&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1216
   a ldp:Container;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1217
   dcterms:title "The assets of JohnZSmith";
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1218
   ldp:membershipSubject &lt;http://example.org/netWorth/nw1&gt;;
210
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1219
   ldp:membershipPredicate o:asset;
c2479399b854 Inserted ldp:membershipObject into examples
sspeiche
parents: 208
diff changeset
  1220
   ldp:membershipObject ldp:MemberSubject.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1221
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1222
&lt;?firstPage&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1223
   a ldp:Page;
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1224
   ldp:pageOf &lt;&gt;;
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
  1225
   ldp:containerSortCriteria (&lt;#SortValueAscending&gt;).
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1226
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1227
&lt;#SortValueAscending&gt;
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1228
   a ldp:ContainerSortCriterion;
226
0e1efef6e333 Changed ldp:ascending->ldp:Ascending, ldp:descending->ldp:Descending, ldp:non-member-resource ->ldp:nonMemberResource
sspeiche
parents: 225
diff changeset
  1229
   ldp:containerSortOrder ldp:Ascending;
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1230
   ldp:containerSortPredicate o:value.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1231
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1232
&lt;http://example.org/netWorth/nw1&gt;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1233
   a o:NetWorth;
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1234
   o:asset &lt;a1&gt;, &lt;a3&gt;, &lt;a2&gt;.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1235
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1236
&lt;a1&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1237
   a o:Stock;
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
  1238
   o:value 100.00 .
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1239
&lt;a2&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1240
   a o:Cash;
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
  1241
   o:value 50.00 .
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1242
&lt;a3&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1243
   a o:RealEstateHolding;
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
  1244
   o:value 300000 .</pre>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1245
		<p>
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1246
			As you can see by the addition of the <code>ldp:ContainerSortCriteria</code> 
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1247
			predicate, the <code>o:value</code> predicate is used
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1248
			to order the page members in ascending order.  It is up to the domain model
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1249
			and server to determine the appropriate predicate to indicate the
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1250
			resource’s order within a page, and up to the client receiving this 
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1251
			representation to use that order in whatever way is appropriate, for 
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1252
			example to sort the data prior to presentation on a user interface.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1253
		</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1254
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1255
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1256
<section id="ldpc-general">
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1257
<h2>General</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
  1258
	<p>The Linked Data Platform does not define how clients
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
  1259
		discover <dfn><abbr title="Linked Data Platform Containers">LDPCs</abbr></dfn>.</p>
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
  1260
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1261
	<div id="ldpc-5_2_1" class="rule">5.2.1 LDPC servers MUST also be conformant LDPR servers. A Linked Data Platform
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
  1262
		Container MUST also be a conformant Linked Data Platform Resource.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1263
	</div>
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1264
	<div id="ldpc-5_2_2" class="rule">5.2.2 LDPC membership is not exclusive; this means that the same resource
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1265
	(LDPR or not) which is identified by its canonical URI, MAY be a member of 
108
075acf700bb9 Updated wording for 5.2.2 from to be more clear
sspeiche
parents: 107
diff changeset
  1266
	more than one LDPC.
85
612f57f3b28e Additional fix in 5.2.2 for ISSUE-34
sspeiche
parents: 84
diff changeset
  1267
	</div>
80
de9e15f7d9d5 Comments received from David Wood: 5.3.7 & 5.1.3 clarity, other minor edits (part 2)
sspeiche
parents: 79
diff changeset
  1268
	<div id="ldpc-5_2_3" class="rule">5.2.3 The state of an LDPC includes information about which
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
  1269
		resources are its members. In the simplest cases, the membership subject
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1270
		will be the LDPC resource itself, but it does not have to be. The
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1271
		membership predicate is also variable and will often be a predicate
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1272
		from the server application vocabulary. If there is no obvious
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1273
		predicate from the server application vocabulary to use, LDPC servers
113
6fd1ba20242d ISSUE-13 Updated 5.2.3 to say any resource can be in a LDPC and inserted 5.5.3 on rejecting member data on PUT to LDPC
sspeiche
parents: 112
diff changeset
  1274
		SHOULD use the <code>rdfs:member</code> predicate. Member resources can be
6fd1ba20242d ISSUE-13 Updated 5.2.3 to say any resource can be in a LDPC and inserted 5.5.3 on rejecting member data on PUT to LDPC
sspeiche
parents: 112
diff changeset
  1275
		any kind of resource identified by its URI, LDPR or otherwise.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1276
	</div>
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1277
	<div id="ldpc-5_2_4" class="rule">5.2.4 An LDPC representation MUST contain exactly one triple 
130
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1278
		whose subject is the LDPC URI, 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1279
		whose predicate is the <code>ldp:membershipSubject</code>, 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1280
		and whose object is the LDPC's membership subject URI.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1281
	</div>
231
38d1a7faf1c4 Various editorial comments from PA
sspeiche
parents: 230
diff changeset
  1282
	<div id="ldpc-5_2_5" class="rule">5.2.5 An LDPC representation MUST contain exactly one triple 
130
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1283
		whose subject is the LDPC URI, 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1284
		and whose predicate is either <code>ldp:membershipPredicate</code> or <code>ldp:membershipPredicateInverse</code>. 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1285
		The object of the triple is constrained by other sections, such as
235
b93936428fcd Fixed some broken references
sspeiche
parents: 234
diff changeset
  1286
		<a href="#ldpc-5_2_5_1">5.2.5.1</a> or <a href="#ldpc-5_2_5_2">5.2.5.2</a>.
130
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1287
	</div>
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1288
	<div id="ldpc-5_2_5_1" class="rule">5.2.5.1 For a given triple <var>T</var> with a subject <var>C</var>
95
68405d7a9fd6 ISSUE-21 Added ldp:membershipPredicateInverse to 5.2.5 &amp; 5.5.2, created 5.2.5.1 &amp; 5.3.5.2 to indicate difference.
sspeiche
parents: 94
diff changeset
  1289
	of the LDPC and predicate of 
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1290
	<code>ldp:membershipPredicate</code>, the object MUST be the URI of the membership predicate <var>P</var> used to
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1291
	indicate membership to the linked to LDPC, or simply: <var>T = ( C</var>, <code>ldp:membershipPredicate</code>, <var>P)</var>. 
98
63281c5a9a43 ISSUE-21 Continued refinement of text, take 2
sspeiche
parents: 97
diff changeset
  1292
	For the membership predicate URI object used in the triple <var>T</var>, it would be found in a resource's
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1293
	same subject <var>R</var> and same predicate <var>P</var> membership triples of the form: 
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1294
	(<var>R</var>, <var>P</var>, <var>MR</var>), where <var>MR</var> represents URI of
98
63281c5a9a43 ISSUE-21 Continued refinement of text, take 2
sspeiche
parents: 97
diff changeset
  1295
	a member resource.
95
68405d7a9fd6 ISSUE-21 Added ldp:membershipPredicateInverse to 5.2.5 &amp; 5.5.2, created 5.2.5.1 &amp; 5.3.5.2 to indicate difference.
sspeiche
parents: 94
diff changeset
  1296
	</div>
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1297
	<div id="ldpc-5_2_5_2" class="rule">5.2.5.2  For a given triple <var>T</var> with a subject <var>C</var>
95
68405d7a9fd6 ISSUE-21 Added ldp:membershipPredicateInverse to 5.2.5 &amp; 5.5.2, created 5.2.5.1 &amp; 5.3.5.2 to indicate difference.
sspeiche
parents: 94
diff changeset
  1298
	of the LDPC and predicate of 
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1299
	<code>ldp:membershipPredicateInverse</code>, the object MUST be the URI of the membership predicate <var>P</var> used to
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1300
	indicate membership to the linked to LDPC, or simply: <var>T = ( C</var>, <code>ldp:membershipPredicateInverse</code>, <var>P)</var>. 
98
63281c5a9a43 ISSUE-21 Continued refinement of text, take 2
sspeiche
parents: 97
diff changeset
  1301
	For the membership predicate URI object used in the triple <var>T</var>, it would be found in a resource's
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1302
	object subject <var>R</var> and same predicate <var>P</var> membership triples of the form: 
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1303
	(<var>MR</var>, <var>P</var>, <var>R</var>), where <var>MR</var> represents URI of
98
63281c5a9a43 ISSUE-21 Continued refinement of text, take 2
sspeiche
parents: 97
diff changeset
  1304
	a member resource.
95
68405d7a9fd6 ISSUE-21 Added ldp:membershipPredicateInverse to 5.2.5 &amp; 5.5.2, created 5.2.5.1 &amp; 5.3.5.2 to indicate difference.
sspeiche
parents: 94
diff changeset
  1305
	</div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1306
	<div id="ldpc-5_2_6" class="rule">5.2.6 The representation of a LDPC MAY include an arbitrary number of
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1307
		additional triples whose subjects are the members of the container,
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1308
		or that are from the representations of the members (if they have RDF
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1309
		representations). This allows a LDPC server to provide clients with
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
  1310
		information about the members without the client having to do a <code>GET</code>
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
  1311
		on each member individually.  See sections <a href="#ldpc-member_data">5.1.1 Container
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
  1312
		Member Information</a>, <a href="#ldpr-inlining" class="sectionRef"></a>, and
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
  1313
		<a href="#ldpc-inlining" class="sectionRef"></a> for additional details.
113
6fd1ba20242d ISSUE-13 Updated 5.2.3 to say any resource can be in a LDPC and inserted 5.5.3 on rejecting member data on PUT to LDPC
sspeiche
parents: 112
diff changeset
  1314
    </div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1315
	<div id="ldpc-5_2_7" class="rule">5.2.7 The representation of a LDPC MUST have <code>rdf:type</code>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1316
		of <code>ldp:Container</code>, but it MAY have additional
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1317
		<code>rdf:type</code>s.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1318
	</div>
215
da72115eb40b Various updates per review of Raul
sspeiche
parents: 213
diff changeset
  1319
	<div id="ldpc-5_2_8" class="rule">5.2.8 LDPC representations SHOULD NOT use RDF container types <code>rdf:Bag</code>,
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
  1320
		<code>rdf:Seq</code> or <code>rdf:List</code>.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1321
	</div>
116
48fabccf847c Issue-35 resolution: do not re-use URIs on create
John Arwe
parents: 115
diff changeset
  1322
	<div id="ldpc-5_2_9" class="rule">5.2.9 LDPC servers SHOULD NOT re-use URIs, 
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
  1323
		regardless of the mechanism by which members are created (<code>POST</code>, <code>PUT</code>, etc.).
116
48fabccf847c Issue-35 resolution: do not re-use URIs on create
John Arwe
parents: 115
diff changeset
  1324
		Certain specific cases exist where a LDPC server MAY delete a resource and then later re-use the
48fabccf847c Issue-35 resolution: do not re-use URIs on create
John Arwe
parents: 115
diff changeset
  1325
		URI when it identifies the same resource, but only when consistent with Web architecture [[WEBARCH]].
48fabccf847c Issue-35 resolution: do not re-use URIs on create
John Arwe
parents: 115
diff changeset
  1326
		While it is difficult to provide absolute implementation guarantees of non-reuse in all failure
48fabccf847c Issue-35 resolution: do not re-use URIs on create
John Arwe
parents: 115
diff changeset
  1327
		scenarios, re-using URIs creates ambiguities for clients that are best avoided.
48fabccf847c Issue-35 resolution: do not re-use URIs on create
John Arwe
parents: 115
diff changeset
  1328
	</div>
238
59bacb9c7b5b Fixed a few punctuation problem's
sspeiche
parents: 237
diff changeset
  1329
	<div id="ldpc-5_2_10" class="rule">5.2.10 Some LDPCs have membership objects that are not directly
181
1bd6eacbb5a6 ISSUE-72 take 2 - added ldp:MemberSubject to handle default case
sspeiche
parents: 180
diff changeset
  1330
	    URIs minted upon LDPC member creation, for example URIs with non-empty fragment identifier [[RFC3986]]. 
238
59bacb9c7b5b Fixed a few punctuation problem's
sspeiche
parents: 237
diff changeset
  1331
	    To determine which object URI to use for the  membership triple, LDPCs MUST contain one triple whose
181
1bd6eacbb5a6 ISSUE-72 take 2 - added ldp:MemberSubject to handle default case
sspeiche
parents: 180
diff changeset
  1332
	    subject is the LDPC URI, predicate is <code>ldp:membershipObject</code>, with an object <var>MO</var>. 
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
  1333
	    Where <var>MO</var> and the HTTP URI <var>R</var> from <code>POST</code> create (as found in HTTP response <code>Location</code> header) can be 
181
1bd6eacbb5a6 ISSUE-72 take 2 - added ldp:MemberSubject to handle default case
sspeiche
parents: 180
diff changeset
  1334
	    used to locate a triple of the form: <var>(R, MO, N)</var> and 
179
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1335
	    where <var>N</var> can be used to construct the membership triple of the form: <var>(membership subject, membership predicate, N)</var>.
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1336
	    When <code>ldp:membershipPredicateInverse</code> is used instead of <code>ldp:membershipPredicate</code>, the membership triple MUST be
181
1bd6eacbb5a6 ISSUE-72 take 2 - added ldp:MemberSubject to handle default case
sspeiche
parents: 180
diff changeset
  1337
	    of the form: <var>(N, membership predicate, membership subject)</var>. To indicate that the member resource URI is the membership object
1bd6eacbb5a6 ISSUE-72 take 2 - added ldp:MemberSubject to handle default case
sspeiche
parents: 180
diff changeset
  1338
	    (the default or typical case), the object MUST be set to predefined URI <code>ldp:MemberSubject</code> such that it forms the triple: 
1bd6eacbb5a6 ISSUE-72 take 2 - added ldp:MemberSubject to handle default case
sspeiche
parents: 180
diff changeset
  1339
	    <var>(LDPC URI, <code>ldp:membershipObject</code>, <code>ldp:MemberSubject</code>)</var>.
179
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1340
	</div>
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1341
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1342
	<!-- NOTE: Saving this sample to help with future editing/understanding or possible insertion directly.
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1343
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1344
	Let's say this LDPC has a membershipSubject of </people/roger> and membershipPredicate of pets:has_pet. If I POST the following to the LDPC: 
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1345
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1346
	<> foaf:primaryTopic <#this> .
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1347
	<#this> 
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1348
	  a animal:Cat; 
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1349
	  foaf:name "Zaza".
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1350
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1351
	... a new resource is created and there is a new membership triple of 
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1352
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1353
	</people/roger> pets:has_pet </people/roger/zaza>.
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1354
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1355
	but the desired one is:
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1356
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1357
	</people/roger> pets:has_pet </people/roger/zaza#this>.
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1358
		
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1359
	To do this, you'd have to use ldp:membershipObject such as:
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1360
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1361
	pets:has_pet 
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1362
	   a ldp:Container;
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1363
	   ldp:membershipPredicate pets:has_pet;
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1364
	   ldp:membershipSubject </people/roger>;
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1365
	   ldp:membershipObject foaf:primaryTopic .
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1366
	 -->
176
60b0a09af2c4 Just a sample for respec bug, will remove
sspeiche
parents: 175
diff changeset
  1367
	
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1368
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1369
333
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1370
<section id="ldpc-HTTP_GET">	
3c2aaaea1f73 Fixed vanishing section ref problem
sspeiche
parents: 331
diff changeset
  1371
<h2>HTTP GET</h2>
120
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1372
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1373
	<div id="ldpc-5_3_1" class="rule">5.3.1 The representation of a LDPC MUST contain a set of triples with a
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1374
		consistent subject and predicate whose objects indicate members of
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1375
		the container. The subject of the triples MAY be the container itself
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
  1376
		or MAY be another resource (as in the <a href="#ldpc-ex-membership-subj">example</a>).  See also
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1377
		<a href="#ldpc-5_2_3">5.2.3</a>.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1378
	</div>
190
fca354408433 Section number fixup: 4.1.8-13->7-12, 4.9.2.* fixup, 5.3.7-10->2-5
sspeiche
parents: 189
diff changeset
  1379
	<div id="ldpc-5_3_2" class="rule">5.3.2 LDPC servers MAY represent the members of a paged LDPC in a sequential
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1380
		order.  If the server does so, it MUST be specify the order using a triple 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1381
		whose subject is the page URI, 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1382
		whose predicate is <code>ldp:containerSortCriteria</code>, 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1383
		and whose object is a <code>rdf:List</code> of
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1384
		<code>ldp:containerSortCriterion</code> resources.  
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
  1385
		The resulting order MUST be as defined by SPARQL <code>SELECT</code>’s <code>ORDER BY</code> clause 
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1386
		[[!SPARQL-QUERY]].
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1387
		Sorting criteria MUST be the same for all pages of a representation; if
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1388
		the criteria were allowed to vary, the ordering among members of a container
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diff changeset
  1389
		across pages would be undefined. 
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parents: 125
diff changeset
  1390
		The first list entry provides the primary
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parents: 125
diff changeset
  1391
		sorting criterion, any second entry provides a secondary criterion used to order members considered
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parents: 125
diff changeset
  1392
		equal according to the primary criterion, and so on.
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parents: 125
diff changeset
  1393
		See section <a href="#ldpc-ordering">5.1.4 Ordering</a> for
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parents: 125
diff changeset
  1394
		an example.
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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parents: 125
diff changeset
  1395
	</div>
190
fca354408433 Section number fixup: 4.1.8-13->7-12, 4.9.2.* fixup, 5.3.7-10->2-5
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parents: 189
diff changeset
  1396
	<div id="ldpc-5_3_3" class="rule">5.3.3 LDPC page representations 
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1397
		ordered using <code>ldp:containerSortCriteria</code> MUST contain, 
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parents: 125
diff changeset
  1398
		in every <code>ldp:containerSortCriterion</code> list entry, 
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parents: 125
diff changeset
  1399
		a triple
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diff changeset
  1400
		whose subject is the sort criterion identifier, 
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parents: 125
diff changeset
  1401
		whose predicate is <code>ldp:containerSortPredicate</code> 
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diff changeset
  1402
		and whose object is 
129
99dfce0c02d9 issue-63 resolution - collations
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parents: 126
diff changeset
  1403
		the predicate whose value is used to order members between pages (the <dfn>page-ordering values</dfn>).
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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parents: 125
diff changeset
  1404
		The only predicate data types whose behavior LDP constrains are those defined
192
221002315344 Removed 4.1.5 and various formatting issues
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diff changeset
  1405
		by SPARQL <code>SELECT</code>’s <code>ORDER BY</code> clause [[!SPARQL-QUERY]].  Other data types
126
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parents: 125
diff changeset
  1406
		can be used, but LDP
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parents: 125
diff changeset
  1407
		assigns no meaning to them and interoperability will be limited.
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parents: 125
diff changeset
  1408
	</div>
190
fca354408433 Section number fixup: 4.1.8-13->7-12, 4.9.2.* fixup, 5.3.7-10->2-5
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parents: 189
diff changeset
  1409
	<div id="ldpc-5_3_4" class="rule">5.3.4 LDPC page representations