RDFa (or Resource Description Framework attributes) is a set of extensions to XHTML being proposed by W3C. RDFa uses attributes from XHTML's meta and link elements, and generalises them so that they are usable on all elements. This allows you to annotate
(oop markup generation) alternative to string manipulation for applications that generate HTML, XHTML or XML... hierarchically created objects that can be progressively, logically defined and then rendered when needed.