ldp.html
author John Arwe
Mon, 15 Jul 2013 12:48:22 -0400
changeset 207 efd0bea81a54
parent 206 812d3e1f3412
parent 205 204759ef91b8
child 208 0cd38b1b5d41
permissions -rw-r--r--
Merge
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<!DOCTYPE html>
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<!-- 
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 Editor TODO:
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   - Insert ldp:membershipObject
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   - Should we remove / hide "Change History" section?
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   - Generate HTML DIFF version
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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:  "2009-08-06",
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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:  "2013-03-07",
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          previousMaturity:  	"FPWD",
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          previousURI: 			"http://www.w3.org/TR/2013/WD-ldp-20130307/",
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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: "2009-08-05",
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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: "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-wg",
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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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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>
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<h1 id="intro">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 some
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	new rules as well as clarifications and extensions of the four rules
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	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.</p> 
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		<p>A special type of Linked Data Resource is a Container.  Containers are very useful 
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		in building application models.  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="#ldpr-5_4">5.4</a>.
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	</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 single page. See <a href="#ldpr-4_9">4.9</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.
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	</p>
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	</div>
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</section>
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<section>
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<h1 id="terms">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> (<dfn><abbr title="Linked Data Platform Resource">LDPR</abbr></dfn>)</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 the <a href="#ldpr" class="sectionRef"></a>.<p></p></dd>
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	<dt><dfn>Linked Data Platform Container</dfn> (<dfn><abbr title="Linked Data Platform Container">LDPC</abbr></dfn>)</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 define
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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>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>
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<h2 id="conventions">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>informative</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. Change History: <b>informative</b></li>
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  <li>C.1 Normative references: <b>normative</b></li>
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  <li>C.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>
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<h1 id="ldpr">Linked Data Platform Resources</h1>
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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 formats 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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<h2 id="ldpr-general">General</h2>
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	<div id="ldpr-4_1_1" class="rule">4.1.1 LDPR servers MUST at least be HTTP/1.1 conformant servers [[!HTTP11]].</div>
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	<div id="ldpr-4_1_2" class="rule">4.1.2 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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	<div id="ldpr-4_1_3" class="rule">4.1.3 LDPR servers MAY host a mixture of LDPRs and non-LDPRs. For example, it
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		is common for LDPR servers to need to host binary or text resources
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		that do not have useful RDF representations.
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	</div>
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	<div id="ldpr-4_1_4" class="rule">4.1.4 LDPRs SHOULD reuse existing vocabularies instead of creating
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		their own duplicate vocabulary terms.  In addition to this general rule, some specific cases are
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		covered by other conformance rules.
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	</div>
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	<div id="ldpr-4_1_4_1" class="rule">4.1.4.1 LDPR predicates SHOULD use standard vocabularies such as Dublin Core
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		[[!DC-TERMS]], RDF [[!RDF-CONCEPTS]] and RDF Schema [[!RDF-SCHEMA]], whenever
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   376
		possible.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   377
	</div>
192
221002315344 Removed 4.1.5 and various formatting issues
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diff changeset
   378
	<div id="ldpr-4_1_5" class="rule">4.1.5 LDPR representations SHOULD have at least one <code>rdf:type</code>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   379
		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
   380
		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
   381
	</div>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   382
	<div id="ldpr-4_1_6" class="rule">4.1.6 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,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   383
		necessary to conform to this specification. These
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   384
		could be other RDF formats, like N3 or NTriples, but non-RDF formats
182
08403f15f875 ISSUE-44 move section 4.1.7 (relationships are simple RDF links) to guidance
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parents: 181
diff changeset
   385
		like HTML [[!HTML401]] and JSON [[!RFC4627]] would likely be common.
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
   386
	</div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   387
		
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   388
	<div id="ldpr-4_1_7" class="rule">4.1.7 LDPRs MAY be created, updated and deleted using methods not defined in
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   389
		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,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   390
		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,
John Arwe <johnarwe@us.ibm.com>
parents: 21
diff changeset
   391
		normative requirements.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   392
	</div>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   393
	<div id="ldpr-4_1_8" class="rule">4.1.8 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)
sspeiche
parents: 58
diff changeset
   394
ones) as response <code>ETag</code> header values.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
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parents:
diff changeset
   395
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   396
	
152
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   397
	<div class="ldp-issue-pending">
43
6d2805d7c6bf Added new issues ranging from 26-43. Removed closed/deferred issues: 2 & 3
sspeiche
parents: 42
diff changeset
   398
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/32">ISSUE-32</a></div>
6d2805d7c6bf Added new issues ranging from 26-43. Removed closed/deferred issues: 2 & 3
sspeiche
parents: 42
diff changeset
   399
	How can clients discover that a resource is an LDPR or LDPC, and what features are supported?
6d2805d7c6bf Added new issues ranging from 26-43. Removed closed/deferred issues: 2 & 3
sspeiche
parents: 42
diff changeset
   400
	</div>
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
   401
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   402
	<div id="ldpr-4_1_9" class="rule">4.1.9 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
   403
		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
   404
		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
   405
		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
   406
		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
   407
		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
   408
		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
   409
		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
   410
		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
   411
		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
   412
	</div>
149
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   413
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   414
<div class="ldp-issue-pending">
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   415
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/57">ISSUE-57</a></div>
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   416
	How can a client determine that it is in communication with an LDP server?
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   417
	</div>
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   418
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   419
	<div id="ldpr-4_1_10" class="rule">4.1.10 LDPR servers
149
3f5f825f1155 issue-57 How can a client determine that it is in communication with an LDP server?
John Arwe
parents: 134
diff changeset
   420
		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
   421
		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
   422
		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
   423
		in all responses to requests made 
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   424
		to the resource's HTTP <code>Request-URI</code>. This is notionally equivalent to the
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   425
		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
   426
		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
   427
		that clients can introspect dynamically at run-time.  Conservative clients should note that 
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   428
		<a href="#ldpr-4_1_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
   429
		that LDP support advertised on one HTTP <code>Request-URI</code> means that other 
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   430
		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
   431
		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
   432
	</div>
152
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   433
<div class="ldp-issue-pending">
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   434
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/78">ISSUE-78</a></div>
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   435
	inferencing levels
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   436
	</div>
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   437
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   438
	<div id="ldpr-4_1_11" class="rule">4.1.11 LDPR servers
152
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   439
		MUST NOT require LDP clients to implement inferencing in order to recognize the subset
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   440
		of content defined by LDP.  Other specifications built on top of LDP MAY require clients
188
8eaaca309617 Various editorial clean up items from editor todo list
sspeiche
parents: 187
diff changeset
   441
		to implement inferencing [[!RDF-CONCEPTS]].  The practical implication is that all content defined by LDP
152
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   442
		must be explicitly represented. 
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   443
	</div>
938e7d21cc10 issue-78 inferencing levels add 4.1.13
John Arwe
parents: 151
diff changeset
   444
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   445
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   446
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   447
<section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   448
<h2 id="ldpr-HTTP_GET">HTTP GET</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   449
	<div id="ldpr-4_2_1" class="rule">4.2.1 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
   450
	</div>
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
   451
	<div id="ldpr-4_2_2" class="rule">4.2.2 LDPR servers MUST provide a <code>text/turtle</code>
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
   452
		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
   453
	</div>
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
   454
	<div id="ldpr-4_2_3" class="rule">4.2.3 LDPR servers MAY provide 
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
   455
		representations of the requested LDPR beyond those
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
   456
		necessary to conform to this specification, using standard HTTP content negotiation. 
14
1d0aec0889c3 Setting mercurial auto model var
sspeiche
parents: 13
diff changeset
   457
		If the client does not indicate a preference, <code>text/turtle</code> MUST be returned.
69
0f9825dea52b Updating some simple formatting, reorganizing open issues and todos
sspeiche
parents: 68
diff changeset
   458
	</div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   459
	<div id="ldpr-4_2_4" class="rule">4.2.4 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
   460
		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
   461
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   462
	<div id="ldpr-4_2_5" class="rule">4.2.5 In the absence of special knowledge of the application or domain, LDPR
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   463
		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
   464
		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
   465
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   466
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   467
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   468
<section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   469
<h2 id="ldpr-HTTP_POST">HTTP POST</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   470
	<p>This specification adds no new requirements on HTTP <code>POST</code> for LDPRs 
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   471
		even when the LDPR supports that method.  This specification does not impose any
93
598be81efe5f Expanded on wording for 4.3 to be more consistent
sspeiche
parents: 92
diff changeset
   472
		new requirement to support that method, and [[!HTTP11]] makes it optional</p>
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   473
	<p>Creation of LDPRs can be done via <a href="#ldpc-HTTP_POST" class="sectionRef"></a> or
202
8d42c2346d50 Fixed numbering issue due to missing end tag for a
sspeiche
parents: 201
diff changeset
   474
		<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
   475
		sections for more details.</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   476
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   477
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   478
<section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   479
<h2 id="ldpr-HTTP_PUT">HTTP PUT</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   480
	<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
   481
		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
   482
		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
   483
		
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   484
	<div id="ldpr-4_4_1" class="rule">4.4.1 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
   485
		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
   486
		the entity representation in the body of the request. 
92
18891627c17f Fixed 2 old references to BPR
sspeiche
parents: 91
diff changeset
   487
		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
   488
		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
   489
		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
   490
		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
   491
		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
   492
		<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
   493
	</div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   494
		
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   495
	<div id="ldpr-4_4_2" class="rule">4.4.2 LDPR clients SHOULD use the HTTP <code>If-Match</code>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   496
		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
   497
		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
   498
		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
   499
		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
   500
		(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
   501
		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
   502
		(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
   503
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   504
	<div id="ldpr-4_4_3" class="rule">4.4.3 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
   505
		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
   506
		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
   507
		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
   508
		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
   509
		set.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   510
	</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
   511
	<div id="ldpr-4_4_4" class="rule">4.4.4 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
   512
		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
   513
		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
   514
		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
   515
		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
   516
	</div>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   517
	<div id="ldpr-4_4_5" class="rule">4.4.5 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
   518
		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
   519
		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
   520
		<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
   521
		[[RFC5789]].
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   522
	</div>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   523
	<div id="ldpr-4_4_6" class="rule">4.4.6 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
   524
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   525
	<div id="ldpr-4_4_7" class="rule">4.4.7 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
   526
		requiring detailed knowledge of server-specific constraints.  
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   527
		This is a consequence of the requirement to <a href="#ldpr-4_1_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
   528
	</div>		
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   529
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   530
		
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   531
<section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   532
<h2 id="ldpr-HTTP_DELETE">HTTP DELETE</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   533
	<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
   534
		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
   535
		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
   536
	<p>Additional requirements on HTTP <code>DELETE</code> of LDPRs within containers can be found in
171
bfb383feed88 Moved 5.7.* sections out of HEAD and into OPTIONS as 5.9.*, added 4.6.2
sspeiche
parents: 170
diff changeset
   537
	<a href="ldpc-HTTP_DELETE">section 5.6</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
   538
		
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   539
	<div id="ldpr-4_5_1" class="rule">4.5.1 LDPR servers MUST remove the resource identified by the <code>Request-URI</code>.
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   540
		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
   541
		<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
   542
		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
   543
	</div>
19
52d63fdf6ae8 ISSUE-24: Should DELETED resources remain deleted?
sspeiche
parents: 18
diff changeset
   544
	
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   545
	<div id="ldpr-4_5_2" class="rule">4.5.2 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
   546
		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
   547
		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
   548
		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
   549
		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
   550
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   551
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   552
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   553
<section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   554
<h2 id="ldpr-HTTP_HEAD">HTTP HEAD</h2>
114
1629ff899e0e Issue-65 remove firstPage
John Arwe
parents: 113
diff changeset
   555
	<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
   556
		<code>HEAD</code> responses include the same headers as <code>GET</code> responses.  
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   557
		Thus, implementers should also carefully read 
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   558
		<a href="#ldpr-HTTP_GET" class="sectionRef"></a>.</p>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   559
	<div id="ldpr-4_6_1" class="rule">4.6.1 LDPR servers MUST support the HTTP <code>HEAD</code> method.</div>
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   560
	<div id="ldpr-4_6_2" class="rule">4.6.2 LDPR servers MUST support the HTTP response headers defined in <a href="#ldpr-HTTP_OPTIONS" class="sectionRef"></a>.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   561
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   562
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   563
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   564
<section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   565
<h2 id="ldpr-HTTP_PATCH">HTTP PATCH</h2>
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   566
	<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
   567
		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
   568
		new requirement to support that method, and [[!HTTP11]] makes it optional.</p>
3e92cccfe6a3 edits to 4., 4.1.2, 4.1.6, http method support (aside from GET on LDPRs, and HEAD, HTTP governs), 5.2.1 clarify, 5.3.2/5.3.3 allow 3xx
John Arwe <johnarwe@us.ibm.com>
parents: 33
diff changeset
   569
		
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   570
	<div id="ldpr-4_7_1" class="rule">4.7.1 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
   571
		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
   572
		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
   573
	</div>
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   574
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   575
	<div id="ldpr-4_7_2" class="rule">4.7.2 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
   576
		requiring detailed knowledge of server-specific constraints.  
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   577
		This is a consequence of the requirement to <a href="#ldpr-4_1_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
   578
	</div>
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   579
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   580
	<div id="ldpr-4_7_3" class="rule">4.7.3 LDPR servers SHOULD NOT allow clients to create new resources using <code>PATCH</code>.
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   581
		<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
   582
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   583
	
124
6f1d7304f03f create different styles to differentiate issues based on their status: open, pending, closed
Arnaud Le Hors <lehors@us.ibm.com>
parents: 122
diff changeset
   584
	<div class="ldp-issue-pending">
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   585
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/32">ISSUE-32</a></div>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   586
	How can clients discover that a resource is an LDPR or LDPC, and what features are supported?
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   587
	</div>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   588
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   589
	<div id="ldpr-4_7_4" class="rule">4.7.4 LDPR servers that support <code>PATCH</code> MUST
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   590
		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
   591
		requests, listing patch document media type(s) supported by the server.
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   592
	</div>
186
a3471f4667d8 Removed closed issues that required no new spec changes: 50, 56, 16, 19, 17
sspeiche
parents: 185
diff changeset
   593
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   594
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   595
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   596
<section>
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   597
<h2 id="ldpr-HTTP_OPTIONS">HTTP OPTIONS</h2>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   598
	<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
   599
		beyond those in [[!HTTP11]].  Other sections of this specification, for example 
167
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   600
		<a href="#ldpr-HTTP_PATCH">PATCH</a>,
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   601
		<a href="#header-accept-post">Accept-Post</a>
ae4592939639 issue-80 Add Accept-Post
John Arwe
parents: 158
diff changeset
   602
		and <a href="#ldpr-paging-HTTP_OPTIONS">Paging</a>,
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   603
		add other requirements on <code>OPTIONS</code> responses.
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   604
		</p>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   605
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   606
	<div class="ldp-issue-pending">
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   607
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/32">ISSUE-32</a></div>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   608
	How can clients discover that a resource is an LDPR or LDPC, and what features are supported?
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   609
	</div>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   610
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   611
	<div id="ldpr-4_8_1" class="rule">4.8.1 LDPR servers MUST support the HTTP <code>OPTIONS</code> method.</div>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   612
		
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   613
	<div id="ldpr-4_8_2" class="rule">4.8.2 LDPR servers MUST indicate their support for HTTP Methods by
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   614
		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
   615
		Method tokens in the HTTP response header <code>Allow</code>.
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   616
	</div>
8af0b25f2748 issue-32 MUST support OPTIONS
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diff changeset
   617
		
8af0b25f2748 issue-32 MUST support OPTIONS
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diff changeset
   618
</section>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   619
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   620
<section>
134
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diff changeset
   621
<h2 id="ldpr-Paging">Paging</h2>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   622
191
ab6b24fcb2b6 Fixed various section marking issues with informative
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parents: 190
diff changeset
   623
<section class="informative">
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   624
<h3 id="ldpr-PagingIntro">Introduction</h3>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   625
	<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
   626
		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
   627
		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
   628
		representation includes many triples both from its own representation and
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   629
		from the representations of any of its members. A client could anticipate that a resource will be too large -
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   630
		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
   631
		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
   632
		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
   633
		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
   634
		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
   635
		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
   636
	<p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   637
		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
   638
		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
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parents: 194
diff changeset
   639
		'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
   640
		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
   641
		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
   642
		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
   643
		- same subject, predicate and object.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   644
	</p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   645
	<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
   646
		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
   647
		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
   648
		resource.  Alternatively, clients may introspect the resource for a paged representation 
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
   649
		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
   650
	<p>
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   651
		Looking at an example resource representing Example Co.'s customer
8afbf5c571e1 Updated LDPR paging section with new non-container example
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parents: 194
diff changeset
   652
		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
   653
		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
   654
		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
   655
		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
   656
		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
   657
		The client then 
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
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parents: 194
diff changeset
   658
		requests the first page as <code>ttp://example.org/customer-relations?firstPage</code>:
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   659
	</p>
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   660
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   661
<pre class="example"># The following is the representation of
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
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parents: 194
diff changeset
   662
#    http://example.org/customer-relations?firstPage
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   663
@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
   664
@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
   665
@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
   666
@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
   667
@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
   668
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   669
&lt;http://example.org/customer-relations&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   670
   a o:CustomerRelations;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   671
   dcterms:title "The customer information for Example Co.";
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   672
   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
   673
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
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parents: 194
diff changeset
   674
&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
   675
   a ldp:Page;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   676
   ldp:pageOf &lt;http://example.org/customer-relations&gt;;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   677
   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
   678
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   679
&lt;client#JohnZSmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   680
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   681
   o:status o:ActiveCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   682
   foaf:name "John Z. Smith".
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   683
&lt;client#BettyASmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   684
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   685
   o:status o:PreviousCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   686
   foaf:name "Betty A. Smith".
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   687
 &lt;client#BettyASmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   688
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   689
   o:status o:PotentialCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   690
   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
   691
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   692
	<p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   693
		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
   694
		for the next page:
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   695
	</p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   696
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   697
<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
   698
#  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
   699
@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
   700
@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
   701
@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
   702
@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
   703
@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
   704
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   705
&lt;http://example.org/customer-relations&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   706
   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
   707
 
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   708
&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
   709
   a ldp:Page;
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   710
   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
   711
   ldp:nextPage rdf:nil.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   712
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   713
&lt;client#GlenWSmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   714
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   715
   o:status o:ActiveCustomer, o:GoldCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   716
   foaf:name "Glen W. Smith".
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   717
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   718
&lt;client#AlfredESmith&gt;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   719
   a foaf:Person;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   720
   o:status o:ActiveCustomer, o:BronzeCustomer;
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   721
   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
   722
	<p>
198
8afbf5c571e1 Updated LDPR paging section with new non-container example
sspeiche
parents: 194
diff changeset
   723
		In this example, there is 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
   724
		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
   725
		predicate of the page resource.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   726
	</p>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   727
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   728
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
<h3 id="ldpr-PagingGET">HTTP GET</h3>
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   731
<p>In addition to the requirements set forth in section (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
   732
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
   733
	<div id="ldpr-pagingGET-1" class="rule">4.9.2.1 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
   734
		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
   735
		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
   736
		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
   737
		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
   738
		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
   739
		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
   740
		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
   741
		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
   742
		The representation for any page, including the first, will include
201
45d0825d4dfc fix broken sectionRef to paging
John Arwe
parents: 200
diff changeset
   743
		the URL for the next page. See <a href="#ldpr-Paging" class="sectionRef"></a> for additional details.
134
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   744
	</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
   745
	<div id="ldpr-pagingGET-2" class="rule">4.9.2.2 LDPR servers MAY split the response representation of any LDPR. 
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   746
		This is known as
201
45d0825d4dfc fix broken sectionRef to paging
John Arwe
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diff changeset
   747
		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)
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parents: 130
diff changeset
   748
		additional details.
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parents: 130
diff changeset
   749
	</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
   750
	<div id="ldpr-pagingGET-3" class="rule">4.9.2.3 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
   751
		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
   752
		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)
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parents: 130
diff changeset
   753
	</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
   754
	<div id="ldpr-pagingGET-4" class="rule">4.9.2.4 LDPR servers that support paging MUST include in the page
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   755
		representation a representation for the LDPR, such that:
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   756
	</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
   757
	<div id="ldpr-pagingGET-5" class="rule">4.9.2.5 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)
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parents: 130
diff changeset
   758
		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)
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parents: 130
diff changeset
   759
		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)
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parents: 130
diff changeset
   760
		whose  subject is the URL of the page, predicate is <code>ldp:pageOf</code>,
206
812d3e1f3412 fix LDPC/LDPR typo
John Arwe
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diff changeset
   761
		and object is the URL of the LDPR.
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   762
	</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
   763
	<div id="ldpr-pagingGET-6" class="rule">4.9.2.6 The page resource representation MUST have one triple with the subject
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   764
		of the page, predicate of <code>ldp:nextPage</code> and
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   765
		object being the URL for the subsequent page.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   766
	</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
   767
	<div id="ldpr-pagingGET-7" class="rule">4.9.2.7 The last page resource representation MUST have one triple with the subject of the 
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   768
	    last page, predicate of <code>ldp:nextPage</code> and object being <code>rdf:nil</code>.
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   769
	</div>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   770
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   771
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   772
<section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
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parents: 130
diff changeset
   773
<h3 id="ldpr-paging-HTTP_OPTIONS">HTTP OPTIONS</h3>
158
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   774
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   775
	<div class="ldp-issue-pending">
8af0b25f2748 issue-32 MUST support OPTIONS
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parents: 152
diff changeset
   776
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/32">ISSUE-32</a></div>
8af0b25f2748 issue-32 MUST support OPTIONS
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parents: 152
diff changeset
   777
	How can clients discover that a resource is an LDPR or LDPC, and what features are supported?
8af0b25f2748 issue-32 MUST support OPTIONS
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parents: 152
diff changeset
   778
	</div>
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   779
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   780
<div id="ldpr-4_9_3_1" class="rule">4.9.3.1 LDPR servers MUST indicate their support for client-initiated paging by
8af0b25f2748 issue-32 MUST support OPTIONS
John Arwe
parents: 152
diff changeset
   781
	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
   782
	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
   783
</div>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   784
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   785
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   786
</section>
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
   787
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   788
<section>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   789
<h2 id="ldpr-inlining">Resource Inlining: Representing Multiple Resources in a Response</h2>
bcc13fba2593 issue-58 action 87 warnings about inlining
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parents: 174
diff changeset
   790
184
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   791
	<div class="atrisk"><p class="atrisktext">Feature At Risk</p>
30f00f94855a copy at-risk markup from turtle spec
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parents: 183
diff changeset
   792
		<p>The LDP Working Group proposes incorporation of the features described in this section.</p>
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John Arwe
parents: 183
diff changeset
   793
		<ul>
30f00f94855a copy at-risk markup from turtle spec
John Arwe
parents: 183
diff changeset
   794
		<li>The addition of <a>resource inlining</a> to save application latency
30f00f94855a copy at-risk markup from turtle spec
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parents: 183
diff changeset
   795
		and server/network load in controlled environments.</li>
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
		<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
   798
		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
   799
	</div>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   800
191
ab6b24fcb2b6 Fixed various section marking issues with informative
sspeiche
parents: 190
diff changeset
   801
<section class="informative">
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   802
<h3 id="ldpr-InliningIntro">Introduction</h3>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   803
	<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
   804
		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
   805
		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
   806
		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
   807
		complete solutions in applications with sufficient controls on resource content.
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   808
		These building blocks are <a>resource inlining</a> and <a>member inlining</a>.
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   809
	</p>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   810
	
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   811
	<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
   812
		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
   813
		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
   814
	</p>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   815
	
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   816
	<p>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   817
		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
   818
		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
   819
		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
   820
		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
   821
		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
   822
		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
   823
		and server/network load.
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   824
	</p>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   825
</section> <!-- h3 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   826
191
ab6b24fcb2b6 Fixed various section marking issues with informative
sspeiche
parents: 190
diff changeset
   827
<section class="informative">
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   828
<h3 id="ldpr-InliningWarnings">Use with Care</h3>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   829
	<div class="ldp-issue-pending">
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   830
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/58">ISSUE-58</a></div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   831
	Action 87: Add an informative section on the possible dangers of inlining resources
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   832
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   833
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   834
	<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
   835
	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
   836
	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
   837
	<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
   838
	</p>
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   839
	<ul>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   840
	<li><p>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   841
		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
   842
		response without attributing each statement to its originating graph (i.e. without quotation),
0ec347702232 issue-58 proofing nits
John Arwe
parents: 176
diff changeset
   843
		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
   844
		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
   845
		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
   846
		once it is available.
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   847
	</p></li>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   848
	<li><p>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   849
		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
   850
		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
   851
		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
   852
		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
   853
		long term solution once standardized.
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   854
	</p></li>
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   855
	</ul>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   856
</section> <!-- h3 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   857
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   858
<section>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   859
<h3 id="ldpr-InliningGET">HTTP GET</h3>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   860
	<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
   861
		LDPR servers that support <a>resource inlining</a>
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   862
		must also follow the requirements in this section.</p>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   863
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   864
	<div class="ldp-issue-pending">
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   865
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/58">ISSUE-58</a></div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   866
	Action 89: Add a predicate ldp:inlinedResource the object of which is a URI of a linked resource that is fully inlined, 
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   867
	marked as AT RISK.
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   868
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   869
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   870
	<div id="ldpr-4_10_3_1" class="rule">4.10.3.1 LDPR servers that support <a>resource inlining</a> MUST 
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   871
		include a <code>ldp:Page</code> resource in the representation describing the set of inlined resources, 
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   872
		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
   873
		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
   874
		the LDPR server supports <a href="#ldpr-Paging">paging</a> in general.  
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
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parents: 173
diff changeset
   875
		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
   876
		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
   877
		in order to minimize client code complexity.
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   878
		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
   879
		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
   880
		requests for them.
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
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   883
	<div id="ldpr-4_10_3_2" class="rule">4.10.3.2 LDPR servers that support <a>resource inlining</a> MUST 
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   884
		include the <code>ldp:Page</code> resource described in <a href="#ldpr-4_10_3_1">section 4.10.3.1</a> 
175
bcc13fba2593 issue-58 action 87 warnings about inlining
John Arwe
parents: 174
diff changeset
   885
		one triple for each inlined resource, 
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   886
		whose subject is the <code>ldp:Page</code> resource URI,
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   887
		whose predicate is <code>ldp:inlinedResource</code>, and
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   888
		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
   889
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   890
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   891
	<div id="ldpc-4_10_3_3" class="rule">4.10.3.3 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
   892
		against any resource whose HTTP <code>Request-URI</code> is the object of a triple of the form 
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   893
		described in <a href="#ldpc-4_10_3_2">section 4.10.3.2</a>, unless there are application-specific
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   894
		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
   895
		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
   896
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   897
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   898
	<div id="ldpc-4_10_3_4" class="rule">4.10.3.4 LDPR clients MUST NOT assume that LDPR representations
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   899
		lacking a <code>ldp:Page</code> resource or lacking the triple
194
b6d66196a02d Fixed biblirefs, consistency items and moved editor todo into comments
sspeiche
parents: 192
diff changeset
   900
		described in <a href="#ldpc-4_10_3_2">section 4.10.3.2</a> contain all the triples for any resource(s)
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
   901
		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
   902
		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
   903
		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
   904
		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
   905
		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
   906
	</div>
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   907
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   908
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   909
174
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   910
</section> <!-- h2 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   911
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   912
</section> <!-- h1 -->
72ce83f4ec7f issue-58 actions 88,89 (new predicates)
John Arwe
parents: 173
diff changeset
   913
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   914
<section>
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
   915
<h1 id="ldpc">Linked Data Platform Containers</h1>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   916
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   917
<section class="informative">		
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   918
<h2 id="ldpc-informative">Informative</h2>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   919
	<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
   920
		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
   921
		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
   922
		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
   923
		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
   924
		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
   925
		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
   926
		are:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   927
	<ol>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   928
		<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
   929
		<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
   930
		<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
   931
		<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
   932
		<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
   933
	</ol>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   934
	<p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   935
		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
   936
		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
   937
		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
   938
		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
   939
		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
   940
		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
   941
		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
   942
		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
   943
		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
   944
		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
   945
		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
   946
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   947
	<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
   948
		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
   949
		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
   950
		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
   951
		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
   952
		container membership, and deleting containers removes membership information and
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
   953
		possibly perform some cleanup tasks on unreferenced member resoruces.</p>
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
   954
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   955
	<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
   956
		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
   957
		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
   958
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   959
<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
   960
#    http://example.org/container1/
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   961
@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
   962
@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
   963
@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
   964
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
   965
&lt;&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   966
   a ldp:Container;
130
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
   967
   ldp:membershipSubject &lt;&gt;
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
   968
   ldp:membershipPredicate rdfs:member;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   969
   dcterms:title "A very simple container";
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
   970
   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
   971
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   972
	<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
   973
			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
   974
			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
   975
			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
   976
			to the container.</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   977
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
   978
	<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
   979
	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
   980
	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
   981
	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
   982
			
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   983
<pre class="example" id="ldpc-ex-membership-full"># The following is a partial representation of
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   984
#   http://example.org/netWorth/nw1
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   985
@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
   986
@prefix o: &lt;http://example.org/ontology/&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   987
&lt;&gt;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   988
   a o:NetWorth;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   989
   o:netWorthOf &lt;http://example.org/users/JohnZSmith&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   990
   o:asset 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   991
      &lt;assetContainer/a1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   992
      &lt;assetContainer/a2&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   993
   o:liability 
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   994
      &lt;liabilityContainer/l1&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   995
      &lt;liabilityContainer/l2&gt;,
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   996
      &lt;liabilityContainer/l3&gt;.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   997
</pre>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
   998
	<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
   999
	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
  1000
	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
  1001
	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
  1002
	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
  1003
	illustrated below:
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1004
	</p>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1005
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1006
<pre class="example" id="ldpc-ex-membership-full"># The following is an elaborated representation of
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1007
#   http://example.org/netWorth/nw1
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1008
@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
  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";
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1024
   ldp:membershipSubject &lt;.&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1025
   ldp:membershipPredicate o:asset.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1026
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1027
&lt;liabilityContainer/&gt;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1028
   a ldp:Container;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1029
   dcterms:title "The liabilities of JohnZSmith";
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1030
   ldp:membershipSubject &lt;.&gt;;
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1031
   ldp:membershipPredicate o:liability.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1032
</pre>
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1033
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1034
	<p>The essential structure of the container is
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1035
	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
  1036
	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
  1037
	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
  1038
	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
  1039
	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
  1040
	to the container. You might wonder why
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1041
	<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
  1042
	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
  1043
	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
  1044
	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
  1045
	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
  1046
	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
  1047
	resources allows both assets and liabilities to be created.
671fe85a872b Inserted examples 2&3, a more complete NetWorth resource
sspeiche
parents: 86
diff changeset
  1048
	</p>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1049
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
  1050
<pre class="example" id="ldpc-ex-membership-subj">
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1051
# 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
  1052
#   http://example.org/netWorth/nw1/assetContainer/
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1053
@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
  1054
@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
  1055
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1056
&lt;&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1057
   a ldp:Container;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1058
   ldp:membershipSubject &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
  1059
   ldp:membershipPredicate o:asset.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1060
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1061
&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
  1062
   a o:NetWorth;
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1063
   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
  1064
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1065
	<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
  1066
			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
  1067
			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
  1068
			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
  1069
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1070
	
191
ab6b24fcb2b6 Fixed various section marking issues with informative
sspeiche
parents: 190
diff changeset
  1071
	<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
  1072
	<p>In many – perhaps most – applications
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1073
		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
  1074
		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
  1075
		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
  1076
		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
  1077
		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
  1078
		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
  1079
		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
  1080
		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
  1081
		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
  1082
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1083
	<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
  1084
		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
  1085
		(assets) in the representation:</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
<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
  1088
#	 http://example.org/netWorth/nw1/assetContainer/
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1089
@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
  1090
@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
  1091
@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
  1092
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1093
&lt;&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1094
   a ldp:Container;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1095
   dcterms:title "The assets of JohnZSmith";
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1096
   ldp:membershipSubject &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
  1097
   ldp:membershipPredicate o:asset.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1098
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1099
&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
  1100
   a o:NetWorth;
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1101
   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
  1102
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1103
&lt;a1&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1104
   a o:Stock;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1105
   o:value 10000.
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1106
&lt;a2&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1107
   a o:Bond;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1108
   o:value 20000.
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1109
&lt;a3&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1110
   a o:RealEstateHolding;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1111
   o:value 300000.</pre>
185
58f49a8417b8 ISSUE-51 Added how a LDPR can show which LDPC is it in
sspeiche
parents: 184
diff changeset
  1112
	<p>In a similar manner, when the representation for the resource of asset <var>.../&lt;a1&gt;</var> is returned a 
58f49a8417b8 ISSUE-51 Added how a LDPR can show which LDPC is it in
sspeiche
parents: 184
diff changeset
  1113
	server may include the membership triple of the form <var>(.../assetContainer/, 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
  1114
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1115
	<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
  1116
	</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1117
	<em>This section is non-normative</em>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1118
	<p>The representation of a container
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1119
		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
  1120
		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
  1121
		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
  1122
		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
  1123
		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
  1124
		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
  1125
		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
  1126
		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
  1127
	<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
  1128
		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
  1129
		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
  1130
		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
  1131
		associating SPARQL endpoints. [[SPARQL-QUERY]]</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1132
	<p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1133
		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
  1134
		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
  1135
		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
  1136
		<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
  1137
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1138
<p>Request:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1139
<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
  1140
Host: example.org
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1141
Accept: text/turtle; charset=UTF-8
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1142
</pre>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1143
<p>Response:</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1144
<pre class="example">HTTP/1.1 200 OK
13
eea17080fdf2 Minor typo fix and some notes
sspeiche
parents: 12
diff changeset
  1145
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
  1146
ETag: "_87e52ce291112"
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1147
Content-Length: 325
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1148
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1149
@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
  1150
@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
  1151
@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
  1152
74
30624f0a7534 Adding trailing '/' on Container URLs to help with readability based on WG suggestion
sspeiche
parents: 73
diff changeset
  1153
&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
  1154
   a ldp:Container;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1155
   dcterms:title "A Linked Data Platform Container of Acme Resources";
130
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1156
   ldp:membershipSubject http://example.org/container1/;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1157
   ldp:membershipPredicate rdfs:member;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1158
   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
  1159
   
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1160
	<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
  1161
		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
  1162
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1163
	<div id="ldpc-ordering" class="rule">5.1.4 Ordering</div>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1164
	<em>This section is non-normative</em>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1165
	<p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1166
		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
  1167
		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
  1168
		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
  1169
		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
  1170
		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
  1171
		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
  1172
		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
  1173
		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
  1174
		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
  1175
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1176
	<p>
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1177
		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
  1178
		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
  1179
		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
  1180
		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
  1181
		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
  1182
		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
  1183
		members on the next and previous pages.
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1184
		When the sort is ascending, all the members on a current page have a 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1185
		higher sort order than all members on the previous page and 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1186
		lower sort order than all the members on the next page. 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1187
		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
  1188
		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
  1189
		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
  1190
		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
  1191
		<code>ldp:containerSortCriteria</code> relation.
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1192
		Each member of the ordered list exposes one <code>ldp:containerSortCriterion</code>, 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1193
		consisting of a <code>ldp:containerSortPredicate</code>, 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1194
		<code>ldp:containerSortPredicate</code>, and 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1195
		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
  1196
	</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1197
	<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
  1198
		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
  1199
<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
  1200
#   http://example.org/netWorth/nw1/assetContainer/
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1201
@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
  1202
@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
  1203
@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
  1204
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1205
&lt;&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1206
   a ldp:Container;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1207
   dcterms:title "The assets of JohnZSmith";
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1208
   ldp:membershipSubject &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
  1209
   ldp:membershipPredicate o:asset.
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1210
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1211
&lt;?firstPage&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1212
   a ldp:Page;
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1213
   ldp:pageOf &lt;&gt;;
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1214
   ldp:ContainerSortCriteria (#SortValueAscending).
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1215
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1216
&lt;#SortValueAscending&gt;
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1217
   a ldp:ContainerSortCriterion;
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1218
   ldp:containerSortOrder ldp:ascendingOrder;
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1219
   ldp:containerSortPredicate o:value.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1220
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1221
&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
  1222
   a o:NetWorth;
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1223
   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
  1224
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1225
&lt;a1&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1226
   a o:Stock;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1227
   o:value 100.00.
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1228
&lt;a2&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1229
   a o:Cash;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1230
   o:value 50.00.
72
73a5766e4794 ISSUE-29 - Use relative URIs in examples
sspeiche
parents: 71
diff changeset
  1231
&lt;a3&gt;
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1232
   a o:RealEstateHolding;
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1233
   o:value 300000.</pre>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1234
		<p>
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1235
			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
  1236
			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
  1237
			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
  1238
			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
  1239
			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
  1240
			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
  1241
			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
  1242
		</p>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1243
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1244
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
  1245
<section>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1246
<h2 id="ldpc-general">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
  1247
	<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
  1248
		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
  1249
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1250
	<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
  1251
		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
  1252
	</div>
108
075acf700bb9 Updated wording for 5.2.2 from to be more clear
sspeiche
parents: 107
diff changeset
  1253
	<div id="ldpc-5_2_2" class="rule">5.2.2 For an LDPC,
188
8eaaca309617 Various editorial clean up items from editor todo list
sspeiche
parents: 187
diff changeset
  1254
	the same resource (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
  1255
	more than one LDPC.
85
612f57f3b28e Additional fix in 5.2.2 for ISSUE-34
sspeiche
parents: 84
diff changeset
  1256
	</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
  1257
	<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
  1258
		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
  1259
		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
  1260
		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
  1261
		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
  1262
		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
  1263
		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
  1264
		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
  1265
	</div>
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
  1266
	
130
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1267
	<div id="ldpc-5_2_4" class="rule">5.2.4 An LDPC MUST contain one triple 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1268
		whose subject is the LDPC URI, 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1269
		whose predicate is the <code>ldp:membershipSubject</code>, 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1270
		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
  1271
	</div>
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
  1272
	
130
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1273
	<div id="ldpc-5_2_5" class="rule">5.2.5 An LDPC MUST contain one triple 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1274
		whose subject is the LDPC URI, 
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1275
		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
  1276
		The object of the triple is constrained by other sections, such as
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1277
		<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>.
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1278
	</div>
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1279
	
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1280
	<div class="ldp-issue-pending">
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1281
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/75">ISSUE-75</a></div>
1e1f91d7effc issue-75 membershipXXX required
John Arwe
parents: 129
diff changeset
  1282
	non-monotonic ldp:membershipXXX relations.  Drafted per 2013-06-18 F2F resolution.
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1283
	</div>
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
  1284
	
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1285
	<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
  1286
	of the LDPC and predicate of 
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1287
	<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
  1288
	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
  1289
	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
  1290
	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
  1291
	(<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
  1292
	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
  1293
	</div>
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
  1294
	
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1295
	<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
  1296
	of the LDPC and predicate of 
97
2299a3fa43b8 ISSUE-21 Continued refinement of text, removed subscripts
sspeiche
parents: 95
diff changeset
  1297
	<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
  1298
	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
  1299
	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
  1300
	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
  1301
	(<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
  1302
	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
  1303
	</div>
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
  1304
	
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1305
	<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
  1306
		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
  1307
		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
  1308
		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
  1309
		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
  1310
		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
  1311
		Member Information</a>, <a href="#ldpr-inlining" class="sectionRef"></a>, and
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
  1312
		<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
  1313
    </div>
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1314
		
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>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1319
	<div id="ldpc-5_2_8" class="rule">5.2.8 LDPCs 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
48fabccf847c Issue-35 resolution: do not re-use URIs on create
John Arwe
parents: 115
diff changeset
  1323
	<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
  1324
		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
  1325
		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
  1326
		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
  1327
		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
  1328
		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
  1329
	</div>
48fabccf847c Issue-35 resolution: do not re-use URIs on create
John Arwe
parents: 115
diff changeset
  1330
	
179
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1331
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1332
	<div id="ldpc-5_2_10" class="rule">5.2.10 Some LDPC's have membership object's that are not directly
181
1bd6eacbb5a6 ISSUE-72 take 2 - added ldp:MemberSubject to handle default case
sspeiche
parents: 180
diff changeset
  1333
	    URIs minted upon LDPC member creation, for example URIs with non-empty fragment identifier [[RFC3986]]. 
200
aebd1e464817 Small editorial cleanup changes
John Arwe
parents: 199
diff changeset
  1334
	    To determine which object URI to use for the  membership triple, LDPC's MUST contain one triple whose
181
1bd6eacbb5a6 ISSUE-72 take 2 - added ldp:MemberSubject to handle default case
sspeiche
parents: 180
diff changeset
  1335
	    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
  1336
	    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
  1337
	    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
  1338
	    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
  1339
	    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
  1340
	    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
  1341
	    (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
  1342
	    <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
  1343
	</div>
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1344
	<div class="ldp-issue-pending">
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1345
	<div class="ldp-issue-title"><a href="http://www.w3.org/2012/ldp/track/issues/72">ISSUE-72</a></div>
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1346
	edited in ldp:membershipObject in new previous section
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1347
	</div>	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1348
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1349
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1350
	<!-- 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
  1351
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1352
	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
  1353
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1354
	<> foaf:primaryTopic <#this> .
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1355
	<#this> 
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1356
	  a animal:Cat; 
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1357
	  foaf:name "Zaza".
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
	... 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
  1360
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1361
	</people/roger> pets:has_pet </people/roger/zaza>.
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1362
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1363
	but the desired one is:
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1364
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1365
	</people/roger> pets:has_pet </people/roger/zaza#this>.
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1366
		
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1367
	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
  1368
	
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1369
	pets:has_pet 
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1370
	   a ldp:Container;
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1371
	   ldp:membershipPredicate pets:has_pet;
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1372
	   ldp:membershipSubject </people/roger>;
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1373
	   ldp:membershipObject foaf:primaryTopic .
9d563e756b28 ISSUE-72 adding 5.2.10 for ldp:membershipObject
sspeiche
parents: 176
diff changeset
  1374
	 -->
176
60b0a09af2c4 Just a sample for respec bug, will remove
sspeiche
parents: 175
diff changeset
  1375
	
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1376
</section>
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1377
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1378
<section>	
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1379
<h2 id="ldpc-HTTP_GET">HTTP GET</h2>
120
edf269bcce8a Issue-64 change ?non-member-properties into Link header with extension relation type
John Arwe
parents: 116
diff changeset
  1380
12
a3be44430b37 ISSUE-8 rename from LDBP to LDP and add remainder of open issues
sspeiche
parents:
diff changeset
  1381
	<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
  1382
		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
  1383
		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
  1384
		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
  1385
		<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
  1386
	</div>
134
917946ac571e ISSUE-33 Moved 5.1.3 Paging (LDPC) to 4.8 (LDPR)
sspeiche
parents: 130
diff changeset
  1387
	
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
  1388
	<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
  1389
		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
  1390
		whose subject is the page URI, 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1391
		whose predicate is <code>ldp:containerSortCriteria</code>, 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1392
		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
  1393
		<code>ldp:containerSortCriterion</code> resources.  
192
221002315344 Removed 4.1.5 and various formatting issues
sspeiche
parents: 191
diff changeset
  1394
		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
  1395
		[[!SPARQL-QUERY]].
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1396
		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
  1397
		the criteria were allowed to vary, the ordering among members of a container
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1398
		across pages would be undefined. 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1399
		The first list entry provides the primary
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
John Arwe
parents: 125
diff changeset
  1400
		sorting criterion, any second entry provides a secondary criterion used to order members considered
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diff changeset
  1401
		equal according to the primary criterion, and so on.
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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parents: 125
diff changeset
  1402
		See section <a href="#ldpc-ordering">5.1.4 Ordering</a> for
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diff changeset
  1403
		an example.
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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diff changeset
  1404
	</div>
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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parents: 125
diff changeset
  1405
	
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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diff changeset
  1406
	<div id="ldpc-5_3_3" class="rule">5.3.3 LDPC page representations 
126
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diff changeset
  1407
		ordered using <code>ldp:containerSortCriteria</code> MUST contain, 
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diff changeset
  1408
		in every <code>ldp:containerSortCriterion</code> list entry, 
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diff changeset
  1409
		a triple
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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diff changeset
  1410
		whose subject is the sort criterion identifier, 
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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parents: 125
diff changeset
  1411
		whose predicate is <code>ldp:containerSortPredicate</code> 
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diff changeset
  1412
		and whose object is 
129
99dfce0c02d9 issue-63 resolution - collations
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parents: 126
diff changeset
  1413
		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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diff changeset
  1414
		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
  1415
		by SPARQL <code>SELECT</code>’s <code>ORDER BY</code> clause [[!SPARQL-QUERY]].  Other data types
126
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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parents: 125
diff changeset
  1416
		can be used, but LDP
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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diff changeset
  1417
		assigns no meaning to them and interoperability will be limited.
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parents: 125
diff changeset
  1418
	</div>
e4ae46fd5294 Issue-14 Resolution: ascending or descending sort, with optional collations
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parents: 125
diff changeset
  1419
	
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
  1420
	<div id="ldpc-5_3_4" class="rule">5.3.4 LDPC page representations 
126
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parents: 125
diff changeset
  1421
		ordered using <code>ldp:containerSortCriteria</code> MUST contain, 
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parents: 125
diff changeset
  1422
		in every <code>ldp:containerSortCriterion</code> list entry, 
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diff changeset