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96 lines
6.1 KiB
96 lines
6.1 KiB
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<title>Semantic Web Interest Group - Web Schemas Task Force</title>
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<link href="../swstyle.css" rel="stylesheet" type="text/css" />
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<style type="text/css">
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body { margin-left: 7em; margin-right: 5em; }
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<p>Nearby: <a href="http://www.w3.org/2011/webschema/track/">issue tracker</a> | <a href="http://www.w3.org/wiki/WebSchemas">wiki</a> | <a href="http://lists.w3.org/Archives/Public/public-vocabs/">public-vocabs list</a></p>
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<hr />
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<p>
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This is a charter for a taskforce of the <a href="/2001/sw/interest/">W3C Semantic Web Interest Group</a>. The Web Schemas Task Force is devoted to practical issues around data schemas for large-scale use in the public Web.
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</p>
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<p>The group will use <a href="http://www.w3.org/wiki/WebSchemas">W3C's Wiki</a> and the <a href="http://lists.w3.org/Archives/Public/public-vocabs/">public-vocabs list</a>.
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For <a href="http://en.wikipedia.org/wiki/Internet_Relay_Chat">IRC</a> discussions, <a href="irc://irc.freenode.net/schema">#schema</a> is available on irc.<a href="http://freenode.net/">freenode.net</a>,
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alongside the existing <a href="irc://irc.freenode.net/swig">#swig</a> (<a href="http://chatlogs.planetrdf.com/swig/">logs</a>)
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and <a href="irc://irc.freenode.net/microformats">#microformats</a> (<a href="http://microformats.org/wiki/irc#Logs">logs</a>) channels. There is also the <a
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href="http://microformats.org/wiki/Main_Page">microformats wiki</a> nearby.
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</p>
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<p>TF chair: R.V.Guha (Google).</p>
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<h2>Web Schemas TF</h2>
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<p>
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The Web is a decentralized, pluralistic system, and the world is too complex for any single, non-extensible or monolithic
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schema to fully describe. Web publishers, with limited resources and attention, have recently started publishing simple
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factual data embedded in mainstream Web content - e.g. using <a href="http://microformats.org/">Microformats</a> conventions, <a href="http://en.wikipedia.org/wiki/RDFa">RDFa</a>,
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<a href="http://en.wikipedia.org/wiki/HTML5">HTML5</a> and <a href="http://en.wikipedia.org/wiki/Microdata_(HTML)">Microdata</a>. For such purposes, simplicity, usability and ease of adoption are critically important. Recent initiatives such as
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Facebook's <a href="http://ogp.me/">Open Graph Protocol</a> and Google/Bing/Yahoo!'s <a href="http://schema.org/">Schema.org</a> announcement have emphasised simple, tightly
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constrained vocabularies that emphasise ease of adoption over expressiveness. Meanwhile, many Web-based APIs expose similar data using schemas expressed in JSON or XML
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(e.g. based on Atom/RSS), with initiatives such as <a href="http://portablecontacts.net/">Portable Contacts</a> and <a href="http://activitystrea.ms/">Activity Streams</a>
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often maintaining both XML and JSON encodings.
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</p>
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<p>
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The taskforce's focus is on collaboration around vocabularies (e.g. <a href="http://www.dublin-core.org/">Dublin Core</a> and <a href="http://www.w3.org/2010/02/rdfa/profile/data/">others</a>),
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mappings (e.g. see <a href="http://schema.rdfs.org/">schema.rdfs.org</a>, <a href="http://blog.dbpedia.org/2011/09/11/dbpedia-37-released-including-15-localized-editions/">DBpedia</a>, <a href="http://lists.w3.org/Archives/Public/public-xg-socialweb/2010May/0009.html">OGP</a>), and around syntax-neutral vocabulary design and tooling,
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rather than questions of markup. In practice, it is not always easy to make such sharp distinctions, and we anticipate the group may be a useful source of use cases and test cases for nearby activities, such as the W3C's
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investigations around <a href="http://en.wikipedia.org/wiki/RDFa">RDFa</a> and <a href="http://en.wikipedia.org/wiki/Microdata_(HTML)">Microdata</a>, or the
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<a href="http://microformats.org/wiki/microformats-2">Microformats-2 discussions</a>.
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</p>
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<p>
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This taskforce was created from an appreciation of both decentralized, pluralistic vocabulary development and the
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benefits of a more tightly coordinated effort. The forum is offered as a place where any project or group can offer some
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accountability and dialog around their work and where both industry consortium and loosely-coordinated initiatives of
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individuals can take the opportunity to articulate how their efforts relate to each other.
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</p>
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<p>
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Participants are encouraged to use the group to take practical steps towards interoperability amongst diverse schemas,
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e.g. through development of mappings, extensions and supporting tools. Those participants who maintain vocabularies in
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any format designed for wide-scale public Web use are welcome to also to participate in the group as a 'feedback
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channel', including practicalities around syntax, encoding and extensibility (which will be relayed to other W3C groups as appropriate).
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</p>
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<p>In-scope topics include:</p>
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<ul>
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<li>use of structured data in mainstream and specialist search engines (both HTML-embedded and in custom feeds)</li>
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<li>use of structured data in social networking, microblogging and link-sharing networks</li>
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<li>convergence of schemas around common use-cases</li>
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<li>documentation of mappings and equivalences between schemas</li>
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<li>syntax issues and practicalities, particularly those for use within HTML</li>
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<li>announcements of new versions, proposals, datasets and changes</li>
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<li>'how do I express this'?' use case discussion</li>
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<li>discussion on common idioms that should be understood by mainstream consumers, to avoid markup duplication</li>
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<li>tools and techniques (software libraries, test cases, validators etc.) to ease difficulty of adoption or costs of diversity</li>
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</ul>
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<p>Out of scope topics include:</p>
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<ul>
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<li>Advocacy of data models or syntaxes without attention to real-world use cases</li>
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<li>The use of inference</li>
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<li>debate over foundational ontologies</li>
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</ul>
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<p>
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This is a public group, and does not itself produce specifications. Instead, it provides a forum in which creators and maintainers of data schemas (aka vocabularies, ontologies) can engage with each other and with those who publish and consume such data. </p>
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<hr />
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$Id: webschema.html,v 1.22 2011/10/21 13:27:02 danbri Exp $
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<br />
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<a href="mailto:danbri@danbri.org">Dan Brickley, W3C SWIG chair.</a>
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</body>
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</html>
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