- XHTML is still based on DTD-s (lack of entities in Schemas)
- RDF within XHTML’s header does not validate…
- Currently, people use
						- link/metain the header (perfectly o.k.!)- using conventions instead of namespaces in metas
 
- put RDF in a comment (e.g., Creative Commons)
 
- XHTML 2.0 will have a separate ‘metadata’ module
						- essentially, the current meta/link elements are extended
- one can define “triplets” using this formalism
- in fact, a new RDF serialization… (like RDF/XML and n3)