RDFa » Specifications

Three Last Call Working Drafts published by the RDFa Working Group

Steven Pemberton — Thu, 02 Feb 2012 15:13:02 +0000

The RDF Web Applications Working Group has published three Last Call Working Drafts:
* RDFa Core 1.1,
* RDFa Lite 1.1 and
* XHTML+RDFa 1.1.

Together, these documents outline the vision for RDFa in a variety of XML and HTML-based Web markup languages. RDFa Core 1.1 specifies the core syntax and processing rules for RDFa 1.1 and how the language is intended to be used in XML documents. RDFa Lite 1.1 provides a simple subset of RDFa for novice Web authors. XHTML+RDFa 1.1 specifies the usage of RDFa in the XHTML markup language.

Public reviews due by 21 February.

Official announcement at W3C.

ODF 1.2 Approved as Standard: Now with RDFa!

Steven Pemberton — Thu, 06 Oct 2011 13:57:55 +0000

The new version of the Open Document Format, ODF 1.2, has been ratified as a standard. One of the changes to ODF 1.2 is the adoption of RDFa as a way of including metadata. Read more at the ODF technical committee chair’s blog.

RDFa 1.1 Nears Completion

Manu Sporny — Thu, 31 Mar 2011 14:56:34 +0000

The RDFa Working Group has published two Second Last Call Working Drafts today – RDFa Core 1.1 and XHTML+RDFa 1.1.

The first Last Call period for RDFa Core 1.1 and XHTML+RDFa 1.1 was started in late October 2010 and extended two times at the request of reviewers and comment submitters in order to get as wide a review as possible. There was input from members of the WHAT Working Group, the HTML Working Group, long-time RDFa Community participants, people working on behalf of large national governments, large and small commercial implementers, and RDFa Processor implementers.

Due to the quality of comments, the RDFa Working Group re-worked various specifications and tightened up features and language that could have caused implementations to diverge. Specifically, work to clarify the error reporting mechanism, generic XML+RDFa processing rules, the initial subject of a document, the further deprecation of xmlns:, and a Processor Graph vocabulary were completed.

The group is asking for comments on these two documents from the public until April 21st 2011. The Candidate Recommendation phase is next, during which the newly updated RDFa Test Suite will be used to test RDFa 1.1 implementations. Once there are two or more interoperable implementations, the RDFa specifications will proceed on toward the final W3C Recommended Specification.

RDFa is a W3C Recommendation!

Steven Pemberton — Thu, 16 Oct 2008 13:22:16 +0000

Today the Semantic Web Deployment Working Group and the XHTML2 Working Group published the W3C Recommendation RDFa in XHTML: Syntax and Processing. This specification allows publishers to express structured data on the Web within XHTML. This allows tools to read it, enabling a new world of user functionality, allowing users to transfer structured data between applications and web sites, and allowing browsing applications to improve the user experience. For those looking for an introduction to the use of RDFa and some real-world examples, please consult the updated RDFa Primer. [W3C link]

RDFa is a Candidate Recommendation

Ben Adida — Fri, 20 Jun 2008 22:22:11 +0000

A big milestone reached today for RDFa: we are now a candidate recommendation, which means it’s now a stable spec, ready for implementation. And of course, we already have a lot of implementations, so we expect this stage of the process to go well.

RDFa support from Open Archives Initiative

Ben Adida — Fri, 06 Jun 2008 14:39:51 +0000

The Open Archives Initiative, which “develops and promotes interoperability standards that aim to facilitate the efficient dissemination of content”, has just published support for RDFa.

Reminder: RDFa Syntax Last Call Comments Due this Week

Steven Pemberton — Wed, 19 Mar 2008 17:08:20 +0000

Just a gentle reminder that the last call period for the RDFa Syntax document ends this week, Friday 21st March.

New Edition of RDFa Primer Published

Steven Pemberton — Wed, 19 Mar 2008 08:36:05 +0000

A new edition of the RDFa Primer has been published. This brings it into line with the latest draft of the RDFa Syntax specification.

RDFa goes to Last Call

Steven Pemberton — Thu, 28 Feb 2008 20:22:33 +0000

The Semantic Web Deployment Working Group and the XHTML 2 Working Group of the W3C have jointly published the Last Call Working Draft of RDFa in XHTML: Syntax and Processing. Comments are welcome through 21 March.

Cool URIs and RDFa

Michael Hausenblas — Tue, 18 Dec 2007 12:24:04 +0000

So, congrats to Leo and Richard: Cool URIs for the Semantic Web is a W3C Working Draft, now. They basically discuss URI design issue regarding both humans and machines. Why do we care? Well, let’s have a look into the document:

The solutions described in the following apply to deployment scenarios in which the RDF data and the HTML data is served separately, such as a standalone RDF/XML document along with an HTML document. The metadata can also be embedded in HTML, using technologies such as RDFa [...], microformats and other documents to which the GRDDL [...] mechanisms can be applied. In those cases the RDF data is extracted from the returned HTML document.

What is your opinion? Do you have practical experiences — that is: no toy setup — in designing URIs in an XHTML+RDFa environment?