Hi there,
When you run a query that does not require inferenc, do you get any results?
Is the ontology loaded into the TDB store?
Does this query return anything:
SELECT *
{?X rdf:type ub:ResearchGroup .
?X ub:subOrganizationOf* <http://www.University0.edu>}
and this one:
SELECT *
{ ub:subOrganizationOf ?p ?o }
Andy
On 15/10/13 20:05, Özgür EROĞLU wrote:
Hi all,
I am trying to configure Fuseki with inference and TDB and using a LUBM
generated data for testing. I have searched for similar configurations
(one of which is here) and read the documentation for Fuseki
configuration .
Following is my Fuseki configuration :
#------------------------------------------------------------------------------------------------------
# Licensed under the terms of http://www.apache.org/licenses/LICENSE-2.0
@prefix : <#> .
@prefix fuseki: <http://jena.apache.org/fuseki#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> .
@prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> .
[] rdf:type fuseki:Server ;
fuseki:services (
<#service1>
) .
# Custom code.
[] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .LUBM
# TDB
tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
tdb:GraphTDB rdfs:subClassOf ja:Model .
## ---------------------------------------------------------------
## Service with only SPARQL query on an inference model.
## Inference model bbase data in TDB.
<#service1> rdf:type fuseki:Service ;
fuseki:name "ds" ; # http://host/inf
fuseki:serviceQuery "sparql" ; # SPARQL query service
fuseki:serviceUpdate "update" ;
fuseki:serviceQuery "query" ;
fuseki:serviceUpload "upload" ;
fuseki:serviceReadWriteGraphStore "data" ;
fuseki:serviceReadGraphStore "get" ;
fuseki:dataset <#dataset> ;
.
<#dataset> rdf:type ja:RDFDataset ;
ja:defaultGraph <#model_inf> ;
.
<#model_inf> a ja:InfModel ;
ja:baseModel <#tdbGraph> ;
ja:reasoner [
ja:reasonerURL <http://jena.hpl.hp.com/2003/OWLFBRuleReasoner>;
]
.
<#tdbDataset> rdf:type tdb:DatasetTDB ;
tdb:location "/tdb/" ;
.
<#tdbGraph> rdf:type tdb:GraphTDB ;
tdb:dataset <#tdbDataset>
.
#------------------------------------------------------------------------------------------------------
I load a dataset which was generated with LUBM data generator. The
generator is UBA1.7 and the ontology is an owl file named Univ-Bench.
My problem here is that when I run a sparql query that requires
inference, I get no result. For example, although the data includes
triples like
#------------------------------------------------------------------------------------------------------
<http://www.Department14.University0.edu/ResearchGroup0>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://www.lehigh.edu/~zhp2/2004/0401/univ-bench.owl#ResearchGroup> .
<http://www.Department14.University0.edu/ResearchGroup0>
<http://www.lehigh.edu/~zhp2/2004/0401/univ-bench.owl#subOrganizationOf>
<http://www.Department14.University0.edu> .
<http://www.Department14.University0.edu>
<http://www.lehigh.edu/~zhp2/2004/0401/univ-bench.owl#subOrganizationOf>
<http://www.University0.edu> .
#------------------------------------------------------------------------------------------------------
when I run the following sparql query, I get no result(empty resultset).
#------------------------------------------------------------------------------------------------------
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX ub: <http://www.lehigh.edu/~zhp2/2004/0401/univ-bench.owl#>
SELECT ?X
WHERE
{?X rdf:type ub:ResearchGroup .
?X ub:subOrganizationOf <http://www.University0.edu>}
#------------------------------------------------------------------------------------------------------
I think Fuseki somehow should know about the ontology (univ-bench). Also
I am not sure whether my Fuseki configuration is ok or not for inference
(e.g. if my reasoner is the right one).
Could someone explain what I am missing here and why I could not get
correct results?
Regards,
Özgür Eroğlu
