GRDDL is a method for embedding machine-readable data into an
XHTML document. GRDDL does not define any specific way of embedding this data, instead it uses
XSLT for extracting the information from the
XHTML document and producing
RDF. Using this method, the machine-readable data within the document can use almost any representation, because GRDDL applications will always be able to transform this representation into
RDF by transforming the document with the
XSLT associated with the document.