Hi,
First a little background:
1. This is my first time using a mailing list, so I hope I'm doing it right.
2. I'm fairly new to Semantic Technologies, and I'm not very familiar with
Jena.
I set up a Fuseki server to use it as a SPARQL endpoint for a VIVO install.
I already set up everything and it seems to be working OK. If I run a query
like:
SELECT * WHERE { ?s ?p ?o }
I don't get any results (I believe that is expected as VIVO uses named
graphs?). If I run a query against the Union Graph, e.g.:
SELECT *
WHERE { GRAPH <urn:x-arq:UnionGraph>
{ ?s ?p ?o }}
I do get results, and that's OK.
So, I'm having some issues trying to make a config file that sets up the
UnionGraph as the default graph, so I can run queries without having to use
the <urn:x-arq:UnionGraph> IRI.
I've read the mailing lists regarding VIVO and SDB (VIVO uses SDB). I've
tried using the config file John Fereira posted a while ago. Here is the
relevant part of the config file:
<#sdb-part> rdf:type ja:RDFDataset ; # If ja:namedGraph is used here, there
is no correspondence # with the name in the SDB store. ja:defaultGraph
<#sdb-one-graph> ; .
<#sdb-one-graph> a sdb:Model ; sdb:dataset <#dataset> ; sdb:graphName
<urn:x-arq:UnionGraph> ;
But when I start Fuseki it gives me an exception:
"com.hp.hpl.jena.sparql.ARQException: Found two matches: var ?root...."
Also, in the configuration page for SDB says that I can set the
"SDB.unionDefaultGraph" option to true, but I don't know if it can be used
in a config file for Fuseki or just when writing apps on Java with SDB ???
Any help would be highly appreciated
Regards,
Eduardo Fernández
