Jörn Hees wrote:
On Tuesday 03 August 2010, Ivan Mikhailov wrote:
What should be added to existing extension API configurable via
"define input:grab-resolver ..."
and "define input:grab-loader ..."
as they're described in
http://docs.openlinksw.com/virtuoso/rdfiridereferencing.html#rdfinputgrab
Sorry, saw your email too late.
Thanks for pointing met o input:grab-resolver, I think that's what I want...
Is there a HowTo for writing such an own grab-resolver method if you would
want all IRIs to be resolved to your local store if they exist, use them; if
not, fetch them and store them locally; not refetching anything more often
than weekly? (searched your docs, but nothing found when I enter
"RDF_GRAB_RESOLVER_DEFAULT"?!?)
Currently when calling the Proxy like this:
http://localhost:8890/about/rdf/http/dbpedia.org/resource/Barack_Obama
it won't use the local DBpedia dump, as the graphs aren't "materialized":
I only have one graph from the DBpedia dump in the local store:
"http://dbpedia.org";, all proxy-calls seem to introduce new graphs such as:
"http://dbpedia.org/resource/Barack_Obama"; (and judging from the time they
take it seems as if they don't use the local store) .
The same counts for all SPARQL-Queries doing a IRI-deref.
So would it be a good idea to substitute http://dbpedia.org with
http://localhost:8890/ in the grab resolver?
Can I perhaps also do this for the proxy in total? (i.e., rewriting
http://localhost:8890/about/rdf/http://dbpedia.org/resource/Barack_Obama to
http://localhost:8890/resource/Barack_Obama )
What are your Virtuoso INI settings? The behavior you describe basically
implies that cache handling is disabled.
The [SPARQL] section of the INI is what's relevant.
Kingsley
Cheers,
Jörn
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