Rdf

Dear all, 

Further to the excellent overall discussion today and  on the question which was raised briefly about  microdata and rdf or rdfa please find below some specifications. 

A tutorial for RDFa exists under http://www.w3.org/TR/xhtml-rdfa-primer/  (the
 full spec is linked from there). The same thing for RDF:http://www.w3.org/TR/2014/NOTE-rdf11-primer-20140624/

I guess, if  needed,  some further information could be given by the real technical experts, like Marc KUSTER or Catherine Tabone, on the advantages and disadvantages of either solution. 

John