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Web Schemas


This is the main Wiki page for W3C's Semantic Web Interest Group Web Schemas task force. Amongst other roles, it serves as a public discussion forum for Schema.org, including Extension proposals.

The taskforce chairs are R.V.Guha (Google) and Dan Brickley (Vrije Universiteit Amsterdam and Google)

In scope include collaborations on mappings, tools, extensibility and cross-syntax interoperability. An HTML Data group is nearby (see also public-html-data-tf list); detailed discussion about Web data syntax belongs there.

See the charter for more details.

The group uses the public-vocabs@w3.org mailing list

  • See public-vocabs@w3.org archives
  • Issue Tracker (organized into "Feedback on X" products/categories, where Xs are Schemas we're discussing)
  • To subscribe, send a message to public-vocabs-request@w3.org with Subject: subscribe (see lists.w3.org for more details).
  • If you are new to the W3C community, you will need to go through the archive approval process before your posts show up in the archives.
  • To edit this wiki, you'll need a W3C account; these are available to all
  • To search just this WebSchemas wiki, the issue tracker and schema.org-related mailing lists, try a a custom search.

Groups who maintain Web Schemas are welcome to use this forum as a feedback channel, in additional to whatever independent mechanisms they also offer.

In particular, the Schema.org initiative has adopted this group as its primary public feedback forum. Others are invited to do likewise.

Any W3C-related questions, ask Dan Brickley (SWIG chair), c/o danbri@danbri.org

Discussion Elsewhere

For background discussion on this group, Schema.org and W3C's SWIG, the Oct 2011 Semantic Link podcast may be of interest.

The Dublin Core Metadata Initiative has a related task group working on Schema.org Alignment, alongside existing vocabulary collaboration work with FOAF.

For schema.org there are discussions on various sites (unofficial; this group is the only place monitored by Schema.org team) :

Proposals from and for Schema.org

The main table for managing/tracking schema.org proposals is maintained here: Schema.org Proposals

A separate entry discussed Schema.org Process as it relates to this group.

Possible future discussions for Schema.org extensions (proposals welcomed; this list is free-form...):

Tools and Statistics


Mappings between various vocabularies of interest on the Web Schemas list. The following are mostly using schema.org as a hub, but others would be great to collect too.

Markup examples

This group is about vocabulary (schemas) rather than specific markup syntax details. However since syntax specs are evolving in parallel, there are often discussions that need to mix syntax and vocabulary issues.

  • from structured-data.org, some examples showing RDFa 1.1 lite versions of Schema.org's Microdata samples

Schema.org example sites - the following list give concrete examples of Schema.org sites (testable with Google richsnippets tool):