Hi Ivan, The current implementation of the SPARQL IRI dereferencing (retrieve missing graph pull-down option) will ask for RDF the target server, in this case the source URL returns xHTML. So when xHTML is retrieved , the SPARQL will extract links with rel=meta , then GRDDL and finally will extract meta about HTML document itself. This may be is not quite correct, so if target server do not return RDF , but it return HTML having embedded RDF, GRDDL and links with rel=meta, which to be preferred i'm not quite sure.
Best Regards, Mitko Ivan Herman wrote: > Kingsley et al, > > I am not sure this is a GRDDL/RDFa issue. However... > > When I run the query: > > SELECT * > FROM <http://www.w3.org/People/Ivan/> > WHERE { > ?s ?p ?o. > } > > It actually display _more_ than I expected. Indeed, it also displays > triples that stem from my foaf file: http://www.ivan-herman.net/foaf.rdf > > There are two references to this foaf file in the GRDDL-d file, namely: > > <div class="right foaf:Person" id="me" about="#me" > > <a rel="owl:sameAs" > href="http://www.ivan-herman.net/foaf.rdf#me"; style="display:none"> </a> > > and > > <link rel="meta" type="application/rdf+xml" title="FOAF" > href="http://www.ivan-herman.net/foaf.rdf"; /> > > > I suspect the first statement is the one that triggered virtuoso to get > all that information. > > It is an interesting issue whether this is o.k. or not. From a strict > SPARQL recommendation point of view I think it is *not*. There should be > some extension functions or extra, out-of-band statement in the SPARQL > query that would instruct the processor what to do with owl:sameAs, as > well as the rdfs:seeAlso. I realize that latter appears in one of the > pull down menu items when invoking the query, but *I did not use any of > those*, I simply 'Retrieve missing graphs' entry (second from the top). > > Ivan > > > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > ------------------------------------------------------------------------ > > _______________________________________________ > Virtuoso-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/virtuoso-devel > -- Mitko Iliev Developer Virtuoso Team OpenLink Software http://www.openlinksw.com/virtuoso Cross Platform Web Services Middleware
