RDF RDF实例 <? xml version="1.0″? <rdf:Rdfxmins:rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns xmlns:contact=http://www.w3.org/2000/10/swap/pim/contact"> Kcontact:Personrdfabout=http://www.w3.org/people/em/cOntact#me"> <contact: fullName>Eric Miller</contact: fullName> <contact: mailbox rdf: resource="mailto: em@w3. org"/> <contact: personalTitle>Dr.</contact: personalTitle> </contact: Person) </rdf: RDF> UR唯一标识被描述的Web资源RDF ◼ RDF实例 <?xml version="1.0"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns" xmlns:contact="http://www.w3.org/2000/10/swap/pim/contact"> <contact:Person rdf:about="http://www.w3.org/People/EM/contact#me"> <contact:fullName>Eric Miller</contact:fullName> <contact:mailbox rdf:resource="mailto:em@w3.org"/> <contact:personalTitle>Dr.</contact:personalTitle> </contact:Person> </rdf:RDF> ◼URI唯一标识被描述的Web资源