YOu can set it from the command line:
--set sdb:unionDefaultGraph=true
may work but may tripup on initialization order (registering sdb:
the long form is:
--set 'http://jena.hpl.hp.com/SDB/symbol#unionDefaultGraph=true'
It may be better to set it in the configuration file:
[] rdf:type fuseki:Server ;
...
ja:context [ ja:cxtName "sdb:unionDefaultGraph" ;
ja:cxtValue "true" ] ;
..
(untested - sorry).
More inline.
On 06/11/13 18:20, Eduardo Fernandez wrote:
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> ;
That is a general dataset with an SDB graph in it - it'll work but is
limited if you want multiple graph access.
But when I start Fuseki it gives me an exception:
"com.hp.hpl.jena.sparql.ARQException: Found two matches: var ?root...."
Different issue - something in the configuration file is wrong such as
having two types, or using the same uri twice.
Post the config file.
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
Andy
