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<!--?xml version="1.0" encoding="utf-8"?-->
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html
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xmlns="http://www.w3.org/1999/xhtml">
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<head profile="http://www.w3.org/2003/g/data-view
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http://purl.org/NET/erdf/profile ">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<!-- @@ http://www.w3.org/2006/03/hcard"> --> <title>W3C RDB2RDF
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Working Group</title>
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/>--> <link rel="stylesheet" type="text/css" href="/2006/02/charter-style.css">
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<link rel="foaf-primaryTopic" href="#rdb2rdf_wg">
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</head>
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<body id="rdb2rdf_wg">
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<div id="header"> <span class="logo"> <a href="/"> <img src="/Icons/WWW/w3c_home_nb"
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alt="W3C"
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border="0"
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height="48"
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width="72">
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</a> </span>
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<div class="breadcrumb"> <a href="../">Semantic Web</a>
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<h1>RDB2RDF Working Group</h1>
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</div>
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<p class="baseline">The <strong>mission</strong> of the RDB2RDF
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Working Group, part of the <a href="/2001/sw/">Semantic Web
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Activity</a>, is to standardize languages for
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mapping relational data and relational database schemas into RDF
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and OWL. The two languages are the Direct Mapping (DM) and the
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RDB2RDF Mapping Language (R2RML).</p>
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<p>The <a href="http://www.w3.org/2011/10/rdb2rdf-charter">RDB2RDF
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Working
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Group Charter</a> shows what the W3C has asked this working
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group to
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do. </p>
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</div>
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<div class="toc">
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<h4>Also On This Page </h4>
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<ul>
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<!-- <li style="display: none"><a href="#start">Start</a></li> -->
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<li><a href="#standard">W3C RDB2RDF Standards and Notes </a></li>
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<li><a href="#inputs">Inputs</a></li>
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<li><a href="#sched">Schedule</a></li>
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<li><a href="#who">Membership</a></li>
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<li><a href="#meeting">Meeting Records</a></li>
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</ul>
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</div>
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<div class="events box">
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<h4 id="current">Current and Upcoming Events</h4>
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<ul>
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<li>Weekly teleconferences on <a href="http://www.w3.org/Guide/1998/08/teleconference-calendar#s_3825">Tuesdays
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12:00EST (16:00 UTC)</a>
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<div style="font-size:smaller">An agenda is sent to <a href="http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/">rdb2rdf-wg</a>
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24 hours in advance. The <a href="http://www.w3.org/2001/sw/rdb2rdf/wiki/Meetings">minutes</a>
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follow within a day or two.</div>
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</li>
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<li>We will be monitoring
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<a href="http://lists.w3.org/Archives/Public/public-rdb2rdf-comments/">comments</a>
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on any specification or test cases</li>
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</ul>
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</div>
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<div class="toolbox box" style="margin-bottom: 1em">
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<h4>Working Group Links</h4>
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<ul>
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<li>Mailing list archives: <a href="http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/">public-rdb2rdf-wg</a>,
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<a href="http://lists.w3.org/Archives/Public/public-rdb2rdf-comments/">public-rdb2rdf-comments</a></li>
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<li><a href="http://www.w3.org/2001/sw/rdb2rdf/wiki/Main_Page">Wiki</a></li>
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<li><a href="http://www.w3.org/2000/09/dbwg/details?group=43889">Participants</a></li>
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<li><a href="http://www.w3.org/2001/sw/rdb2rdf/track/">Tracker</a></li>
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<li><a href="http://www.w3.org/2001/sw/rdb2rdf/track/issues/open">Open
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Issues</a></li>
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<li><a href="http://www.w3.org/2001/sw/rdb2rdf/track/actions/open">Open
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Actions</a></li>
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<li><a href="http://www.w3.org/2009/08/rdb2rdf-charter">Charter</a></li>
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</ul>
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</div>
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<div>
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<h2 id="standard">RDB2RDF W3C Standards and Notes</h2>
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<ul>
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<li><a href="http://www.w3.org/TR/r2rml/">R2RML: RDB to RDF
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Mapping Language</a>, W3C Working Draft</li>
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<li><a href="http://www.w3.org/TR/rdb-direct-mapping/">A Direct
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Mapping of Relational Data to RDF</a>, W3C Working Draft</li>
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<li><a href="http://www.w3.org/2001/sw/rdb2rdf/test-cases/">R2RML
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and Direct Mapping Test Cases</a>, W3C Editor's Draft</li>
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<li><a href="http://www.w3.org/TR/rdb2rdf-ucr/">Use Cases and
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Requirements for Mapping Relational Databases to RDF</a>,
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W3C Working Draft</li>
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</ul>
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</div>
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<div>
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<h2 id="inputs">Inputs</h2>
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<ul>
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<li> <a href="http://www.w3.org/DesignIssues/RDB-RDF.html">Relational
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Databases on the Semantic Web</a>, Tim Berners-Lee, Design
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Issue Note, 1998-2009.
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</li>
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<li> <a href="http://www.w3.org/2005/Incubator/rdb2rdf/RDB2RDF_SurveyReport.pdf">A
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Survey of Current Approaches for Mapping of Relational
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Databases to RDF</a> (PDF), Satya S. Sahoo, Wolfgang Halb,
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Sebastian Hellmann, Kingsley Idehen, Ted Thibodeau Jr, Sören
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Auer, Juan Sequeda, Ahmed Ezzat, 2009-01-31.
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<p style="font-size: smaller"> This document surveys the
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current techniques, tools and applications for mapping
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between Relational Databases (RDB) and Resource Description
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Framework (RDF). Some knowledge of RDF as well as RDB
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concepts and technologies is assumed for readers of this
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document. The survey is intended to enable the members of
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the W3C RDB2RDF Incubator Group to: (1) collate the existing
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state of the art in mapping approaches between RDB and RDF,
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and (2) use the reference framework defined in this survey
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to effectively compare the different mapping approaches.</p>
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</li>
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<li> <a href="http://www.w3.org/2005/Incubator/rdb2rdf/XGR/">Incubator
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Group Report</a>, Ashok Malhotra (ed), 2009-01-31.
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<p style="font-size: smaller">This document is the final
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report from the RDB2RDF XG. The XG recommends that the W3C
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initiate a WG to standardize a language for mapping
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Relational Database schemes into RDF and OWL.</p>
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</li>
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<li> <a href="http://esw.w3.org/topic/Rdb2RdfXG/ReusableIdentifier">Reusable
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Identifiers in the RDB2RDF mapping language</a>, Michael
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Hausenblas and Themis Palpanas. </li>
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</ul>
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<p><small>These are documents produced outside the RDB2RDF Working
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Group that will be inputs to the standardization work of
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RDB2RDF WG. Please alert the co-Chairs or Staff Contact of the
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Working Group if you know of any material that you think
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merits inclusion.</small></p>
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</div>
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<div>
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<h2 id="sched">Schedule of Deliverables</h2>
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<ul>
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<li>A specification for languages to map relational data and
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relational schemas to RDF and OWL (tentatively called R2RML and Direct Mapping)
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as W3C Recommendations.</li>
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<li>A set of test cases to test conformance. It is up to the
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Working Group to decide whether it wishes to publish this
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document as a W3C Recommendation or as a Working Group Note.</li>
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</ul>
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</div>
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<div id="wg-other-deliverables">
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<h3>Other Deliverables</h3>
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<p>These are deliverables that the group plans to produce, in line
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with the
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scope description above, but only if the time and the available
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manpower allows
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it. The Working Group will have to decide whether these
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documents will be
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published as Working Group Notes or additional Recommendations.</p>
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<ul>
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<li>An alternate "human-readable" syntax for R2RML.</li>
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<li>A set of profiles for R2RML sufficient to provide specific,
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simpler functionality.</li>
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<li>An R2RML primer.</li>
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</ul>
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</div>
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<table class="roadmap" width="80%">
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<caption>Milestones</caption>
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<tbody>
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<tr>
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<th colspan="1" rowspan="1">Specification</th>
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<th colspan="1" rowspan="1"><acronym title="First Working Draft">FPWD</acronym></th>
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<th colspan="1" rowspan="1"><acronym title="Last Call Working Draft">LC</acronym></th>
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<th colspan="1" rowspan="1"><acronym title="Candidate Recommendation">CR</acronym></th>
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<th colspan="1" rowspan="1"><acronym title="Proposed Recommendation">PR</acronym></th>
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<th colspan="1" rowspan="1"><acronym title="Recommendation">Rec, WG Note, Wiki page</acronym></th>
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</tr>
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<tr>
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<th colspan="1" rowspan="1">R2RML</th>
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<td colspan="1" rowspan="1" class="WD1">9/2010</td>
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<td colspan="1" rowspan="1" class="LC">9/2011</td>
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<td colspan="1" rowspan="1" class="CR">12/2011</td>
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<td colspan="1" rowspan="1" class="PR">3/2012</td>
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<td colspan="1" rowspan="1" class="REC">6/2012 (Rec)</td>
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</tr>
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<tr>
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<th colspan="1" rowspan="1">Direct Mapping </th>
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<td colspan="1" rowspan="1" class="WD1">9/2010<br>
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</td>
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<td colspan="1" rowspan="1" class="LC">9/2011<br>
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</td>
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<td colspan="1" rowspan="1" class="CR">12/2011<br>
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</td>
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<td colspan="1" rowspan="1" class="PR">3/2012<br>
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</td>
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<td colspan="1" rowspan="1" class="REC">6/2012 (Rec)<br>
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</td>
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</tr>
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<tr>
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<th colspan="1" rowspan="1">R2RML Test Cases</th>
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<td colspan="1" rowspan="1" class="WD1">3/2011</td>
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<td colspan="1" rowspan="1" class="LC">1/2012</td>
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<td colspan="1" rowspan="1" class="CR"> </td>
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<td colspan="1" rowspan="1" class="PR"> </td>
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<td colspan="1" rowspan="1" class="REC">3/2012 (Wiki pages)</td>
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</tr>
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<tr>
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<th colspan="1" rowspan="1">Direct Mapping Test Cases </th>
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<td colspan="1" rowspan="1" class="WD1">3/2011</td>
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<td colspan="1" rowspan="1" class="LC">1/2012</td>
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<td colspan="1" rowspan="1" class="CR"> </td>
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<td colspan="1" rowspan="1" class="PR"> </td>
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<td colspan="1" rowspan="1" class="REC">3/2012 (Wiki pages)</td>
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</tr>
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</tr>
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<tr>
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<td rowspan="1" colspan="6">Note: The group will document
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significant changes from this initial schedule on the group
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home page.</td>
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</tr>
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</tbody>
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</table>
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<div>
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<h3 id="timeline">Timeline View Summary</h3>
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<ul>
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<li>September 2009: First teleconference</li>
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<li>June 2010: First face-to-face meeting</li>
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<li>July 2010: Requirements and Use Cases for the RDB2RDF Mapping
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Language (R2RML)</li>
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<li>September 2010: First Public Working Draft for R2RML</li>
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<li>September 2010: First Public Working Draft for DM</li>
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<li>March 2011: First Public Working Draft for R2RML Test Cases</li>
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<li>March 2011: First Public Working Draft for DM Test Cases</li>
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<li>September 2011: R2RML Syntax - Last Call</li>
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<li>September 2011: DM Semantics - Last Call</li>
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<li>December 2011: R2RML Syntax - Candidate Recommendation</li>
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<li>December 2011: DM Semantics - Candidate Recommendation</li>
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<li>January 2012: R2RML Test Cases - Last Call</li>
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<li>January 2012: DM Test Cases - Last Call</li>
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<li>March 2012: R2RML Syntax - Proposed Recommendation</li>
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<li>March 2012: DM Semantics - Proposed Recommendation</li>
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<li>June 2012: R2RML Syntax - Recommendation</li>
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<li>June 2012: DM Semantics - Recommendation</li>
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<li>March 2012: R2RML Test Cases - Final Version</li>
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<li>March 2012: DM Test Cases - Final Version</li>
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</ul>
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<p><small>The working group schedule is an estimate based on the <a
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href="http://www.w3.org/2011/10/rdb2rdf-charter">schedule
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in the
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charter</a> and subject to negotiation with peer groups via
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the <a href="../CG/">Semantic Web Coordination
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Group</a></small>.</p>
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</div>
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<div>
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<h2 id="who">Group Membership and Joining</h2>
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<p>We encourage new members of the group to introduce themselves
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by
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email. <em>The <a href="http://www.w3.org/2000/09/dbwg/details?group=43889">full
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RDB2RDF
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WG participants list</a> is available to W3C members.</em></p>
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<p>If you want to join the group:</p>
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<ul>
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<li> If you're affiliated with a <a href="http://www.w3.org/Consortium/Member/List">W3C
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member organization</a>
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<ol>
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<li>Use the <a href="http://cgi.w3.org/MemberAccess/AccessRequest">form
|
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for getting a W3C account</a></li>
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<li>Have your <a href="http://www.w3.org/Member/ACList">AC
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representative</a> nominate you using the <a href="http://www.w3.org/2004/01/pp-impl/43889/join">form
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for joining this WG</a>.</li>
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</ol>
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</li>
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<li>Otherwise, contact the <a href="#chairtc">chair and team
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contact</a> about invited expert status. That will involve <a
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href="http://cgi.w3.org/MemberAccess/Public">getting
|
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an account</a> and filling out a <a href="http://www.w3.org/2002/09/wbs/1/ieapp/">form
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for copyright,
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patent, etc. policies</a>.</li>
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</ul>
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</div>
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<div>
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<h2 id="meeting">Meeting Records</h2>
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<p>
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The meeting records are maintained on a dedicated <a href="http://www.w3.org/2001/sw/rdb2rdf/wiki/Meetings">Wiki
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page</a> ...
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</p>
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</div>
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<div>
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<h2 id="charter_history">RDB2RDF history</h2>
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<p>These events pre-date the RDB2RDF Working Group:</p>
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<ul>
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<li>2008/2009: <a href="http://www.w3.org/2005/Incubator/rdb2rdf/">RDB2RDF
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Incubator Group</a></li>
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<li>25-26 October, 2007: W3C Workshop on <a href="http://www.w3.org/2007/03/RdfRDB/"
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title="W3C Workshop on RDF Access to Relational Databases">RDF
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Access to Relational Databases</a></li>
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</ul>
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<h3>W3C Working Group Resources</h3>
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<ul>
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<li><a href="../../../Guide/">Art of Consensus Guide</a> <small>W3C
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member confidential</small></li>
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<li><cite><a href="http://www.w3.org/2005/10/Process-20051014/">World
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Wide Web Consortium Process Document</a></cite> 14 October
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2005</li>
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<li><a href="/Member/Mail/Overview.html">W3C Groups</a>, <a href="http://www.w3.org/2000/09/dbwg/details?group=43889">Participants
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(dbwg)</a> <small>W3C member confidential</small></li>
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</ul>
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</div>
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<hr>
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<address id="chairtc"> <span class="vcard"> <a class="uid" href="@@">
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<span class="fn">Ashok Malhorta</span> </a>, <span class="org">Oracle</span>,
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<span class="role">Chair</span> </span> <br>
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<span class="vcard"> <a class="uid" href="http://sw-app.org/mic.xhtml">
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<span class="fn">Michael Hausenblas</span> </a>, <span class="org">DERI</span>,
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<span class="role">Chair</span> </span> <br>
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<span class="vcard"> <a class="fn uid" href="http://www.w3.org/People/Ivan/">Ivan Herman</a>, <span class="org">W3C</span>, <span class="role">staff
|
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contact</span> </span> <br>
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|
<small>$Revision: 1.30 $ of $Date: 2011/11/17 13:48:31 $</small>
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|
</address>
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</body>
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</html>
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