Hm. Your mail made me think about this... And I wonder what the right behaviour is.
Let me ask: is that so that for *any* XHTML file you encounter you will retrieve the rel=meta element, regardless of GRDDL? I presume the answer is 'yes'. It may be the right behaviour after all... Ivan Mitko Iliev wrote: > 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 >> > > -- Ivan Herman, W3C Semantic Web Activity Lead URL: http://www.w3.org/People/Ivan/ PGP Key: http://www.cwi.nl/%7Eivan/AboutMe/pgpkey.html FOAF: http://www.ivan-herman.net/foaf.rdf
smime.p7s
Description: S/MIME Cryptographic Signature
