Public Working Draft of RDFa API
http://www.w3.org/2010/02/rdfa/
http://www.w3.org/TR/2010/WD-rdfa-api-20100608/

The RDFa Working Group has published the First Public Working Draft of the “RDFa API.” RDFa API provides a mechanism that allows Web-based applications using documents containing “RDFa” markup to extract and utilize structured data in a way that is useful to developers. The specification details how a developer may extract, store and query structured data contained within one or more RDFa-enabled documents. The design of the system is modular and allows multiple pluggable extraction and storage mechanisms supporting not only RDFa, but also Microformats, Microdata, and other structured data formats. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.