Hi Alex and Hugh, I put the maxrows in as a parameter in the same way as query and it did work restrict the results to less than the 1000, but it did not allow me to select more than 1000 even though I had both maxrows and the LIMIT set to more than 1000. My impression from the original email about maxrows was that it could be used to ask for more results than the hardcoded 1000 limit internally used by the DBpedia endpoint but I guess that is not the case.
Cheers, Peter ----- Original Message ---- > From: Alex <[email protected]> > To: Hugh Williams <[email protected]> > Cc: Peter Ansell <[email protected]>; [email protected] > Sent: Monday, 28 September, 2009 5:16:20 AM > Subject: Re: [Virtuoso-users] Installing DBpedia datasets > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi Hugh, > > I've tried your suggestion of specifying the maxrows parameter, but > don't seem to be seeing any difference using the DBpedia SPARQL endpoint > (http://dbpedia.org/sparql). As far as I understand (the page isn't > particularly clear on this), the parameter should be passed as an HTTP > header. Perhaps I am mistaken on this? > > The following is a test SPARQL request I sent over HTTP: > > - ------------------------------------------------------------ > > POST /sparql HTTP/1.1 > Content-Type: application/x-www-form-urlencoded > maxrows: 500 > Host: dbpedia.org > Content-Length: 547 > Connection: Keep-Alive > > query=%0d%0aPREFIX+skos%3a+%3chttp%3a%2f%2fwww.w3.org%2f2004%2f02%2fskos%2fcore%23%3e%0d%0aPREFIX+dbpedia%3a+%3chttp%3a%2f%2fdbpedia.org%2fresource%2f%3e%0d%0aPREFIX+dbpedia-cat%3a+%3chttp%3a%2f%2fdbpedia.org%2fresource%2fCategory%3a%3e%0d%0aPREFIX+dbpedia-owl%3a+%3chttp%3a%2f%2fdbpedia.org%2fontology%2f%3e%0d%0aPREFIX+foaf%3a+%3chttp%3a%2f%2fxmlns.com%2ffoaf%2f0.1%2f%3e%0d%0a%0d%0aSELECT+DISTINCT+%3farticle+%3fname+WHERE%0d%0a%7b%0d%0a++++%3farticle+a+dbpedia-owl%3aMilitaryConflict+.+%0d%0a++++%3farticle+foaf%3aname+%3fname+.%0d%0a%7d%0d%0a > > - ------------------------------------------------------------ > > Yet I am still receiving 1000 triples in response. Any ideas what could > be going wrong here? > > Thanks, > Alex > > Hugh Williams wrote: > > Hi Peter, > > > > The current ResultSetMaxRows parameter in the Virtuoso configuration > > file is 1000, restricting all SPARQL queries against the server to a > > maximum of that size: > > > > http://docs.openlinksw.com/virtuoso/dbadm.html#ini_SPARQL > > > > This can be overridden by passing the "maxrows" sparql query option with > > your query as detailed at: > > > > > http://docs.openlinksw.com/virtuoso/rdfsparql.html#rdfsparqlprotocolendpoint __________________________________________________________________________________ Get more done like never before with Yahoo!7 Mail. Learn more: http://au.overview.mail.yahoo.com/
