GRDDL Primer: Working Group Note
http://www.w3.org/TR/2007/NOTE-grddl-primer-20070628/
http://www.w3.org/RDF/
http://www.w3.org/2001/sw/
The GRDDL Working Group published “GRDDL Primer” as a Working Group Note. Linking microformats to the Semantic Web, the GRDDL mechanism is used to extract RDF statements from XHTML and XML content using programs such as XSLT. The primer contains detailed illustrations of GRDDL techniques.