- From: Ben Adida <ben@adida.net>
- Date: Thu, 26 Jul 2007 10:03:41 -0700
- To: RDFa <public-rdf-in-xhtml-tf@w3.org>, SWD WG <public-swd-wg@w3.org>
Hi all, Mark, Ralph and I had a very productive chat today where we agreed on some non-binding resolutions. Our next steps are to A) update the test cases B) update the implementations C) update the RDFa syntax doc (yes, we can start on this!) Why non-binding? Because we were only 3 on the call and the resolutions will be best achieved by *trying* them out in actual implementations, rather than theorizing on them endlessly. So, here they are, your non-binding resolutions. 1) @instanceof is the attribute name for rdf:type 2) @id does *not* play a role in RDFa triple generation. 3) @rel, @rev, and @instanceof cause chaining (aka striping), whether or not there is @href/@resource on the element. (2) and (3) cause changes to the rules I laid out a few days ago, so I will restate the rules completely now. - @rel (conversely @rev) creates triples with the given predicate. The object of @rel (conversely the subject of @rev) is the "RDF identity" of the current element, and the subject of contained elements is implicitly set to that same "RDF identity." - @instanceof applies to the "RDF identity" of the current element, and sets of the subject of contained elements to this same "RDF identity." - the RDF identity of an HTML element is, in order of precedence - @resource - @href - @src if it's an IMG - @about - a new bnode (NOTE how @id is not present in this list anymore.) Thus, here are some examples: <div about="#me" rel="foaf:knows" instanceof="foaf:Person"> <span property="foaf:name">Mark</span> </div> <#me> foaf:knows [ rdf:type foaf:Person ; foaf:name "Mark" ] . <div about="#me" rel="foaf:knows" instanceof="foaf:Person" href="http://example.org/~mark"> <span property="foaf:name">Mark</span> </div> <#me> foaf:knows <http://example.org/~mark> . <http://example.org/~mark> rdf:type foaf:Person ; foaf:name "Mark" . <div about="#me" instanceof="foaf:Person"> <span property="foaf:name">Ben</span> </div> <#me> rdf:type foaf:Person . foaf:name "Ben" . <div instanceof="foaf:Person"> <span property="foaf:name">Ben</span> </div> _:div0 rdf:type foaf:Person ; foaf:name "Ben" . <img about="#me" rel="foaf:image" src="ben.jpg" /> <#me> foaf:image <ben.jpg> . And in any of these cases, adding @id doesn't change a thing about the RDFa triples generated. -Ben
Received on Thursday, 26 July 2007 17:03:52 UTC