Sergey Chernyshev wrote: > I'm thinking about different forms of RDF publishing that is being > adopted by various data consumers and RDFa (and possible eRDF) seem to > be quite interesting - Yahoo hopes to support it in SearchMonkey > eventually and RDFa usecases at W3 even mention it in connection with > SMW: http://www.w3.org/TR/2007/WD-xhtml-rdfa-scenarios-20070330/#use-case-6 > > The question to Markus and Denny, are there any plans for this?
Heh, I brought that up years ago when I first heard of RDF/a (below). I think I filed an enhancement bug but I can't find it now. However, I wonder how useful RDFa in SMW is. Every SMW page explicitly identifies that its facts are available as rdf+xml in the official standard manner: <link rel="alternate" type="application/rdf+xml" title="Berlin" href="/index.php?title=Special:ExportRDF/Berlin&xmlmime=rdf" /> So is it only tools that ignore this and just look for RDFa in HTML that benefit? Are there lots of such tools? The bookmarklet I mention below (hah, it's been in my browser toolbar for over two years and I haven't used it for 18 months) would highlight any RDFa statements in HTML. That might be useful but a) SMW shows all its statements in the factbox, and b) many SMW pages hide their statements (with the "| " alternate text). I'm not arguing against it, just wondering. -- =S Page = = = = = = = early message = = = = = = = Subject: Re: [Semediawiki-user] Do (could) types show up in the HTML? Date: Sun, 26 Mar 2006 22:51:12 -0800 To: [EMAIL PROTECTED] References: <[EMAIL PROTECTED]> Summary: consider RDF/A for this. Rich Morin <[EMAIL PROTECTED]> wrote a while ago: > I've looked at the source code for the page > http://wiki.ontoworld.org/index.php/Help:Relation, > looking for any encoding of the type information in > the generated links. I haven't found any, but I may > not be looking in the right places, way, etc. > > In any case, I would like to promote the idea of > making this information "visible" to web browsers, > web crawlers, etc. Denny Vrandecic <[EMAIL PROTECTED]> responded: > Nice idea. Is there already a syntax for that, like > <a href="target-url" type="link-type-url">shown text</a> Yes. I think RDF/A , "syntax for expressing RDF metadata within XHTML", is designed to do this. You use the rel= attribute of <a href> with a value from a particular vocabulary's namespace. The cool thing about RDF/A is it also provides a way to denote property values using <span property=>. To misquote the fine http://wiki.ontoworld.org/index.php/San_Diego page, It is the county seat of San Diego County, with a population of 1,223,400. I'm guessing its XHTML with type information encoded in RDF/A would be <html smw:="http://smw.ontoware.org/2005/smw"; > ... It is the county seat of <a href="/index.php/San_Diego_County" rel="smw:_Relation-3AIs_county_seat_of">San Diego County</a>, with a population of <span property="smw:_Attribute-3APopulation">1,223,400</span>. One of the people on the "RDF in XHTML Taskforce" has a basic bookmarklet to highlight RDF/A triples in HTML documents, http://lists.w3.org/Archives/Public/public-rdf-in-xhtml-tf/2006Mar/0010.html It would seem pretty feasible to add the <span property=> tag in the SMWParseAttributesCallback() hook. Adding the rel= attribute to relation hyperlinks is harder as SMW currently relies on MediaWiki's default [[wiki link]] processing after it's parsed the relations. The RDF/A primer http://www.w3.org/TR/2006/WD-xhtml-rdfa-primer-20060310/ is pretty approachable compared with other W3 documents (until it gets into URIs and CURIEs :-). Regards, -- =S ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Semediawiki-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/semediawiki-devel
