On 26 February 2014 10:45, Joonas Suominen <joonas.suomi...@wikimedia.fi> wrote: > How about using RDFa and foaf:primaryTopic like in this example > https://en.wikipedia.org/wiki/RDFa#XHTML.2BRDFa_1.0_example > > 2014-02-26 20:18 GMT+02:00 Paul Houle <ontolo...@gmail.com>: > >> Isn't there some way to do this with schema.org?
The FOAF options were designed for relations between entities and documents - foaf:primaryTopic relates a Document to a thing that the doc is primarily about (i.e. assumes entity IDs as value, pedantically). the inverse, foaf:isPrimaryTopicOf, was designed to allow an entity description in a random page to anchor itself against well known pages. In particular we had Wikipedia in mind. http://xmlns.com/foaf/spec/#term_primaryTopic http://xmlns.com/foaf/spec/#term_isPrimaryTopicOf (Both of these share a classic Semantic Web pickyness about distinguishing things from pages about those things). Much more recently at schema.org we've added a new property/relationship called http://schema.org/sameAs It relates an entity to a reference page (e.g. wikipedia) that can be used as a kind of proxy identifier for the real world thing that it describes. Not to be confused with owl:sameAs which is for saying "here are two ways of identifying the exact same real world entity". None of these are a perfect fit for a relationship between a random Web page and a reference page. But maybe close enough? Both FOAF and schema.org are essentially dictionaries of hopefully-useful terms, so you can use them in HTML head, or body, according to taste, policy, tooling etc. And you can choose a syntax (microdata, rdfa, json-ld etc.). I'd recommend using the new schema.org 'sameAs', .e.g. in rdfa lite, <link href="https://en.wikipedia.org/wiki/Buckingham_Palace"; property="http://schema.org/sameAs"; /> This technically says "the thing we're describing in the current element is Buckingham_Palace. If you want to be more explicit and say "this Web page is about a real world Place and that place is Buckingham_Palace ... you can do this too with a bit more nesting; the HTML body might be a better place for it. Dan _______________________________________________ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
