Hi, Dan --
On Dec 30, 2009, at 11:47 AM, Daniel Alexander Smith wrote:
Apologies if I've not read the manual correctly. I'm trying to add
some RDF/XML from the web to my VOS store via ODBC.
I've previously using local files fine. Now I want to add a file, such
as:
http://purl.org/net/das301.xrdf
Well... That URI apparently identifies a resource, but it's not
a file -- as the 302 tells you.
I'm trying this command:
helix:dataprocessor das05r$ /usr/local/virtuoso-opensource/bin/isql
OpenLink Interactive SQL (Virtuoso), version 0.9849b.
Type HELP; for help and EXIT; to exit.
SQL> CALL DB.DBA.RDF_LOAD_RDFXML_MT(http_get('http://purl.org/net/das301.xrdf')
, '', 'dataproc_foo');
Connected to OpenLink Virtuoso
Driver: 05.11.3039 OpenLink Virtuoso ODBC Driver
*** Error 22007: [Virtuoso Driver][Virtuoso Server]XM033: XML parser
detected an error:
FATAL : Non-whitespace character found instead of XML element
at line 4 column 27 of source text
<TITLE>302 Found</TITLE>
------------------------^
at line 1 of Top-Level:
CALL DB.DBA.RDF_LOAD_RDFXML_MT(http_get('http://purl.org/net/das301.xrdf')
, '', 'dataproc_foo')
Is http_get the right thing to use? It's not following the 302, it
seems to be trying to parse it as a source?
http_get() is fine, as far as it goes -- but RDF_LOAD_RDFXML_MT
wasn't built with crawling in mind, which is what you're doing
once you go beyond URIs that return `200 OK` to the GET.
For now, your best bet is to let the Sponger handle the crawling,
easily done with curl or wget calls to URIs like --
<http://your-instance.example.com:4321/sparql?default-graph-uri=http%3A%2F%2F purl.org%2Fnet%2Fdas301.xrdf&should-sponge=soft&query=select+*+where+{%3Fs+%3Fp+%3Fo}&format=text%2Fhtml&debug=on
>
You can use other Virtuoso pragma options to tailor your query
as required. Further details on IRI de-referencing and use of
pragmas can be obtained from:
<http://docs.openlinksw.com/virtuoso/rdfiridereferencing.html>
Hope that helps!
Ted
Many thanks,
Dan
--
Daniel Alexander Smith
IAM Group
School of Electronics and Computer Science
University of Southampton
[email protected]
--
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