Conformance to Syntax
An RDFa document is any XHTML 1.1 document.
Conformance to Semantic
An RDFa extractor takes an XHTML 1.1 document and generates an RDF graph by applying the RDFa extraction rules. Note: The resulting RDF graph is not expected to include all possible features of the RDF Recommendation, e.g. reification and containers are not supported.