academia association for computing machinery british computer society cardiff university clearforest data spaces data web database dereferenceable uniform resource identifier description logic digital enterprise research institute dublin core embedded rdf england grddl hyperdata hypermedia hypertext transfer protocol information architecture institution of engineering and technology internet james hendler kingsley idehen knowledge management linked data london massachusetts institute of technology mathematics microformat multimedia n-triples nigel shadbolt openlink software open database connectivity ora lassila oracle corporation order of the british empire oxford brookes university plain old semantic html rdf schema rdfa resource description framework royal academy of engineering rule interchange format skos sparql search engine optimization semantic web semantic web rule language semantic network talis group tim berners-lee topic maps uniform resource identifier united kingdom university of pretoria university of southampton web ontology language world wide web xml