Friday, October 17, 2008


The technical specification RDFa in XHTML Syntax and Processing was formally accepted as a Web Consortium Technical Recommendation by W3C Director Tim Berners-Lee.
The current Web is primarily made up of an enormous number of documents that have been created using HTML. These documents contain significant amounts of structured data, which is largely unavailable to tools and applications. When publishers can express this data more completely, and when tools can read it, a new world of user functionality becomes available, letting users transfer structured data between applications and web sites, and allowing browsing applications to improve the user experience: an event on a web page can be directly imported into a user's desktop calendar; a license on a document can be detected so that users can be informed of their rights automatically; a photo's creator, camera setting information, resolution, location and topic can be published as easily as the original photo itself, enabling structured search and sharing.

RDFa is a specification for attributes to express structured data in any markup language. This document specifies how to use RDFa with XHTML.

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