Activity
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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!--?xml version="1.0" encoding="utf-8"?-->
<!--?xml version="1.0" encoding="utf-8"?-->
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Semantic Web Activity Statement</title>
<link href="http://www.w3.org/StyleSheets/base.css" rel="stylesheet" type="text/css" />
<link href="http://www.w3.org/StyleSheets/activities.css" rel="stylesheet" type="text/css" />
</head>
<body>
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<ul id="Navigate"><li><a href="/">W3C Home</a><ul class="nav"><li><a href="/Consortium/">About W3C</a><ul class="nav"><li><a href="/Consortium/activities">W3C Activities</a><ul class="nav"><li class="boldblack">
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<div id="Contents">
<h1>Semantic Web Activity Statement</h1>
<p>The goal of the Semantic Web initiative is as broad as that of
the Web: to create a universal medium for the exchange of data.
It is envisaged to smoothly interconnect personal information
management, enterprise application integration, and the global
sharing of commercial, scientific and cultural data. Facilities
to put machine-understandable data on the Web are quickly
becoming a high priority for many organizations, individuals and
communities.</p>
<p>The Web can reach its full potential only if it becomes a place
where data can be shared and processed by automated tools as
well as by people. For the Web to scale, tomorrow's programs
must be able to share and process data even when these programs
have been designed totally independently. The Semantic Web
Activity is an initiative of the World Wide Web Consortium (W3C)
designed to provide a leadership role in defining this Web. The
Activity develops open specifications for those technologies
that are ready for large scale deployment, and identifies,
through open source advanced development, the infrastructure
components that will be necessary to scale in the Web in the
future.</p>
<p>The principal technologies of the Semantic Web fit into a set
of layered specifications. The current components are the
Resource Description Framework (RDF) Core Model, the RDF Schema
language, the Web Ontology language (OWL), and the Simple
Knowledge Organization System (SKOS). Building on these core
components is a standardized query language, SPARQL (pronounced
"sparkle"), enabling querying decentralized collections of RDF
data. The POWDER recommendations provide technologies to find
resource descriptions for specific resources on the Web;
descriptions which can be ‘joined’ to other RDF data. The GRDDL
and RDFa Recommendations aim at creating bridges between the RDF
model and various XML formats, like XHTML. RDFa also plays an
important role as a format to add Structured Data to HTML, i.e.,
as a means to help using Linked Data in Web Applications.
Finally, the goal of the R2RML language (under development) is
to provide standard language to map relational data and
relational database schemas to RDF and OWL. </p>
<h2>Highlights Since the Previous Advisory Committee Meeting</h2>
<p>As a result of a successful <a href="http://www.w3.org/2011/01/RDFDispComments.html">Activity
Renewal request</a> the new <a href="http://www.w3.org/2011/01/rdf-wg-charter.html">RDF
Working Group</a> has begun its work in February 2011. The The
mission of the group is to update the 2004 version of the <a href="http://www.w3.org/TR/2004/REC-rdf-concepts-20040210/">Resource
Description Framework (RDF) Recommendation</a>. The group held
its first F2F meeting in April 2011, in Amsterdam, the
Netherlands, and has published two First Public Working Drafts:
<a href="http://www.w3.org/TR/2011/WD-turtle-20110809/">“Turtle
Terse RDF Triple Language”</a> and <a href="http://www.w3.org/TR/2011/WD-rdf11-concepts-20110830/">“RDF
1.1 Concepts and Abstract Syntax”</a>.</p>
<p>The RDF Working Group was also chartered to consider a JSON
based serialization of RDF, as a means to bring these two
communities further. After internal discussions it was decided
that the RDF Working Group may not have the right expertise (due
to the fact that it does not have Javascript and JSON developers
in its midst); the JSON related work has now been spun off into
a separate <a href="http://www.w3.org/community/json-ld/">“JSON
for Linking Data” Community Group</a>, whose work is based on
the upcoming <a href="http://json-ld.org/spec/latest/">JSON-LD</a>
specification.<br />
</p>
<p>Although the plan for the SPARQL Working Group was to issue a
Last Call Working Draft in December 2010, the technical issues
arising did not make this possible. It was also important to
settle some outstanding coordination issue with the RDF Working
Group, which also added to the delays. There was also a request
from the community to add the JSON return format to the list of
Recommendations the group plans to produce; this lead to a
necessary rechartering of the Group. This chartering process <a href="http://lists.w3.org/Archives/Member/w3c-ac-members/2011AprJun/0051.html">started
in June</a>, and the new charter was <a href="http://lists.w3.org/Archives/Member/w3c-ac-members/2011JulSep/0005.html">approved
in July</a>. The plan is to issue a Last Call Working Draft
in September. <br />
</p>
<p>The <a href="http://www.w3.org/2001/sw/rdb2rdf/">RDB2RDF
Working Group</a> has publishes a Last Call Working Draft for
its two main documents, i.e., the <a href="http://www.w3.org/TR/2011/WD-r2rml-20110920/" checked="true">R2RML Language</a> and the <a href="http://www.w3.org/TR/2011/WD-rdb-direct-mapping-20110920/" checked="true">Direct Mapping to RDF</a> on the 20th of
September, 2011. </p>
<p>The <a href="http://www.w3.org/2010/02/rdfa/">RDFWA Working
Group</a> (formerly known as RDFa Working Group) is operating
under a <a href="http://www.w3.org/2011/03/rdfwa-wg-charter.html">new
charter</a> to also develop an RDF API Recommendation. The
group published a new version of the <a href="http://www.w3.org/TR/2011/WD-rdfa-api-20110419/">RDFa
API document</a> in April, and a First Public Working Draft
for the <a href="http://www.w3.org/TR/2011/WD-rdf-interfaces-20110510/">RDF
Interfaces</a> in May. On the RDFa side, the group published a
2nd Last Call for <a href="http://www.w3.org/TR/2011/WD-rdfa-core-20110331/">RDFa
1.1 Core</a> in March. Although no major comments came back
from the community on that document, the subsequent
announcement, in June, of the <a href="http://schema.org/">schema.org</a>
organization and the related discussions on the usage of RDFa
and/or microdata and the mutual relationships of the two
documents created a new situation. A number of issues came up
that were raised by a more general demand of a better
relationships between these two formats, and which may lead to
technical adjustment in RDFa 1.1. </p>
<p>Related to the schema.org discussions, the <a href="http://www.w3.org/2001/sw/interest/">Semantic
Web Interest Group</a> has started two task forces: the <a href="http://www.w3.org/2001/sw/interest/webschema.html">Web
Schemas Task Force</a>, that looks at the vocabulary
evolution, and the <a href="http://www.w3.org/wiki/Html-data-tf">HTML
Data Task Force</a>, whose goal is to provide a technical
analysis on the relationship of microdata, microformats, and
RDFa, with possible change proposals on the W3C specifications.
</p>
<p>As a result of a successful <a href="http://www.w3.org/2011/03/SWDispComments.html">Activity
Renewal request</a> the new <a href="http://www.w3.org/2011/03/prov-wg-charter.html">Provenance
Working Group</a> has begun its work in April 2011. The
mission of the Provenance Working Group is to support the
widespread publication and use of provenance information of Web
documents, data, and resources. </p>
<p>The <a href="http://www.w3.org/2001/sw/hcls/">Semantic Web
Health Care and Life Sciences Interest Group (HCLSIG)</a> has
had a charter renewal, <a href="http://lists.w3.org/Archives/Member/w3c-ac-members/2011JulSep/0015.html">started
in August 2011</a>, which ended successfully in <a href="http://lists.w3.org/Archives/Member/w3c-ac-members/2011JulSep/0044.html">September
2011</a>. Since early September the group operates under its <a href="http://www.w3.org/2011/09/HCLSIGCharter">new charter</a>.
<br />
</p>
<p>Both the <a href="http://www.w3.org/2007/OWL">OWL Working
Group</a> and the <a href="http://www.w3.org/2005/rules/wg">Rule
Interchange Format (RIF)</a> is kept in a “dormant” state. The
reason is that both the OWL2 and the RIF Recommendation will
have to be re-issued when the XSD 1.1 document becomes a
standard; the documents can then normatively refer to the XSD
1.1 datatypes (which is not the case today). No substantial
change on OWL2 and RIF are planned, though.</p>
<h2>Upcoming Activity Highlights</h2>
<p class="classname">The Activity has to actively participate in
the discussions surrounding the announcement of schema.org, the
further evolution of that vocabulary, its relationships to other
vocabularies, etc. The issue of the exact syntax used for
Structured Data on the Web (microformats, microdata, or RDFa)
has also gained lots of attentions since the last AC meeting,
involving various communities, the W3C TAG, and the Activity has
to continue playing an active role in this area.<br />
</p>
<p class="classname">The Activity plans a Workshop on “<a href="http://www.w3.org/2011/09/LinkedData/">Linked
Data Patterns for Implementation Applications on the World
Wide Web</a>”, in December 2011, hosted by IBM. The goal of
the Workshop is to understand what requirements and challenges
Linked Data technologies have when using them in an enterprise
environment, what are the areas that might require W3C’s
attention for future work in that area.<br />
</p>
Summary of Activity Structure
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(<a title="Participants in the OWL Working Group [Member-only link]" href="http://www.w3.org/2000/09/dbwg/details?group=41712">participants</a>)</span></th><td>Ian Horrocks, Alan Ruttenberg</td><td>Sandro Hawke, Ivan Herman</td><td><a href="http://www.w3.org/2007/06/OWLCharter">Chartered</a> until 31 December 2012</td></tr><tr><th scope="row"><a href="http://www.w3.org/2001/sw/DataAccess/">SPARQL Working Group</a><span class="partlink"><br />
(<a title="Participants in the SPARQL Working Group [Member-only link]" href="http://www.w3.org/2000/09/dbwg/details?group=35463">participants</a>)</span></th><td>Lee Feigenbaum, Axel Polleres</td><td>Sandro Hawke</td><td><a href="http://www.w3.org/2011/05/sparql-charter">Chartered</a> until 30 June 2012</td></tr><tr><th scope="row"><a href="http://www.w3.org/2005/rules/wg.html">Rule Interchange Format Working Group</a><span class="partlink"><br />
(<a title="Participants in the Rule Interchange Format Working Group [Member-only link]" href="http://www.w3.org/2000/09/dbwg/details?group=38457">participants</a>)</span></th><td>Christian de Sainte Marie, Christopher Welty</td><td>Sandro Hawke</td><td><a href="http://www.w3.org/2005/rules/wg/charter.html">Chartered</a> until 31 December 2012</td></tr><tr><th scope="row"><a href="http://www.w3.org/2010/02/rdfa/">RDF Web Applications Working Group</a><span class="partlink"><br />
(<a title="Participants in the RDF Web Applications Working Group [Member-only link]" href="http://www.w3.org/2000/09/dbwg/details?group=44350">participants</a>)</span></th><td>Ben Adida, Manu Sporny</td><td>Ivan Herman</td><td><a href="http://www.w3.org/2011/03/rdfwa-wg-charter.html">Chartered</a> until 1 October 2012</td></tr><tr><th scope="row"><a href="http://www.w3.org/2001/sw/CG/">Semantic Web Coordination Group</a><span class="partlink"><br />
(<a title="Participants in the Semantic Web Coordination Group [Member-only link]" href="http://www.w3.org/2000/09/dbwg/details?group=34729">participants</a>)</span></th><td>Ivan Herman</td><td>Ivan Herman</td><td><a href="http://www.w3.org/2006/07/swcg-charter">Chartered</a> until 28 February 2013</td></tr><tr><th scope="row"><a href="http://www.w3.org/2001/sw/hcls/">Semantic Web Health Care and Life Sciences Interest Group</a></th><td>Michel Dumontier, Charles Mead, Vijay Bulusu</td><td>Eric Prud'hommeaux</td><td><a href="http://www.w3.org/2011/09/HCLSIGCharter.html">Chartered</a> until 31 August 2014</td></tr><tr><th scope="row"><a href="http://www.w3.org/2001/sw/interest/">Semantic Web Interest Group</a></th><td>Dan Brickley</td><td>Ivan Herman</td><td><a href="http://www.w3.org/2006/07/swig-charter">Chartered</a> until 28 February 2013</td></tr><tr><th scope="row"><a href="http://www.w3.org/2001/sw/rdb2rdf/">RDB2RDF Working Group</a><span class="partlink"><br />
(<a title="Participants in the RDB2RDF Working Group [Member-only link]" href="http://www.w3.org/2000/09/dbwg/details?group=43889">participants</a>)</span></th><td>Ashok Malhotra, Michael Hausenblas</td><td>Ivan Herman, Eric Prud'hommeaux</td><td><a href="http://www.w3.org/2009/08/rdb2rdf-charter.html">Chartered</a> until 30 September 2012</td></tr><tr><th scope="row"><a href="http://www.w3.org/2011/rdf-wg/">RDF Working Group</a><span class="partlink"><br />
(<a title="Participants in the RDF Working Group [Member-only link]" href="http://www.w3.org/2000/09/dbwg/details?group=46168">participants</a>)</span></th><td>David Wood, Guus Schreiber</td><td>Sandro Hawke, Ivan Herman</td><td><a href="http://www.w3.org/2011/01/rdf-wg-charter">Chartered</a> until 31 January 2013</td></tr><tr><th scope="row"><a href="http://www.w3.org/2011/prov/">Provenance Working Group</a><span class="partlink"><br />
(<a title="Participants in the Provenance Working Group [Member-only link]" href="http://www.w3.org/2000/09/dbwg/details?group=46974">participants</a>)</span></th><td>Luc Moreau, Paul Groth</td><td>Sandro Hawke</td><td><a href="http://www.w3.org/2011/01/prov-wg-charter.html">Chartered</a> until 1 October 2012</td></tr></tbody></table>
<hr />
<p id="about-ac-mtg"><!--This paragraph will be updated automatically-->
This Activity Statement was prepared for
<a href="http://www.w3.org/2011/11/TPAC/">TPAC 2011</a> per <a href="/Consortium/Process/activities#Activities">section 5</a>
of the <a href="/Consortium/Process/">W3C Process Document</a>.
<a href="/2005/04/activity/processActivityStatements.xsl">Generated</a>
from <a href="http://www.w3.org/2000/04/mem-news/public-groups.rdf">group data</a>.
</p>
<address> <a href="http://www.w3.org/People/Ivan/">Ivan Herman</a>,
Semantic Web Activity Lead </address>
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