New release of the microdata to rdf mapping note

Posted on October 9, 2012 by Ivan Herman

The Semantic Web Interest Group has published a new version of the Group Note of Microdata to RDF.

HTML microdata is an extension to HTML used to embed machine-readable data into HTML documents. Whereas the microdata specification describes a means of markup, the output format is JSON. This specification describes processing rules that may be used to extract RDF from an HTML document containing microdata.

This update adds support for vocabulary expansion, for example to support features such as schema:additionalType. Microdata vocabulary expansion is a tiny subset of the RDFa vocabulary expansion but follows the same principle: the graph extracted from a microdata document is passed through a specific processor that adds additional triples to the graph (e.g., in the schema:additionalType case, it adds corresponding rdf:type triples).

About Ivan Herman

Ivan Herman is the Semantic Web Activity Lead at W3C. He graduated as a mathematician at the Eötvös Loránd University of Budapest, Hungary, in 1979. After a brief scholarship at the Université Paris VI he joined the Hungarian research institute in computer science (SZTAKI) where he worked for 6 years. He left Hungary in 1986 and, after a few years in industry, he joined the Centre for Mathematics and Computer Sciences (CWI) in Amsterdam where he has held a tenure position since 1988. He received a PhD degree in Computer Science in 1990 at the Leiden University, in the Netherlands. Ivan joined the W3C team as Head of Offices in January 2001 while maintaining his position at CWI. He served as Head of Offices until June 2006, when he was asked to take the Semantic Web Activity Lead position.

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