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Posted to users@jena.apache.org by Jeanette Samuelsen <je...@gmail.com> on 2013/12/10 18:41:26 UTC
OWL Inferencing on TDB database in Fuseki
Hello,
I have tried to make a configuration file for Fuseki to make OWL
inferencing work with a TDB database. Thus far I have been able to do
inferencing on an empty dataset, to connect to the TDB database and do
queries, but not both.
This is the error I'm currently getting:
"com.hp.hpl.jena.assembler.exceptions.AmbiguousSpecificTypeException:
cannot find a most specific type for
file:///home/path/jena/jena-fuseki-1.0.0/test.ttl#dataset2, which has as
possibilities: ja:Model tdb:DatasetTDB."
I tried fixing the error by doing tdb:DatasetTDB rdfs:subClassOf ja:Model ,
but this was not possible.
Below is my configuration file.
Any help would be greatly appreciated.
Best regards,
Jeanette
@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#> .
@prefix sdb: <http://jena.hpl.hp.com/2007/sdb#> .
[] rdf:type fuseki:Server ;
fuseki:services ( <#tdb> ) .
<#tdb> rdf:type fuseki:Service ;
fuseki:name "tdb" ;
fuseki:serviceQuery "sparql" ;
fuseki:serviceUpdate "update" ;
fuseki:dataset <#model2> ;
.
#select which set to . #use
[] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
tdb:GraphTDB rdfs:subClassOf ja:Model .
<#dataset2>
rdf:type tdb:DatasetTDB;
tdb:location "/home/path/tdb/sports" ;
tdb:unionDefaultGraph true ;
.
<#model2> rdf:type ja:InfModel;
ja:baseModel <#dataset2>;
ja:reasoner
[ ja:reasonerURL <http://jena.hpl.hp.com/2003/OWLFBRuleReasoner>;
ja:schema <#interpretationSchema>
] .
#<#tdbGraph> rdf:type tdb:GraphTDB; tdb:location "DB"; .
<#interpretationSchema> a ja:MemoryModel ;
ja:content [ ja:externalContent <file:/home/path/running.n3> ;
]
.
Re: OWL Inferencing on TDB database in Fuseki
Posted by Diogo FC Patrao <dj...@gmail.com>.
Hello Jeanette
Is your configuration file set to store in memory the results of inferences
over TDB data ? I'm interested in loading the whole inference closure at
startup time, is that what you're trying to do?
Thanks!
--
diogo patrão
On Tue, Dec 10, 2013 at 3:41 PM, Jeanette Samuelsen <
jeanette.samuelsen@gmail.com> wrote:
> Hello,
>
> I have tried to make a configuration file for Fuseki to make OWL
> inferencing work with a TDB database. Thus far I have been able to do
> inferencing on an empty dataset, to connect to the TDB database and do
> queries, but not both.
>
> This is the error I'm currently getting:
> "com.hp.hpl.jena.assembler.exceptions.AmbiguousSpecificTypeException:
> cannot find a most specific type for
> file:///home/path/jena/jena-fuseki-1.0.0/test.ttl#dataset2, which has as
> possibilities: ja:Model tdb:DatasetTDB."
>
> I tried fixing the error by doing tdb:DatasetTDB rdfs:subClassOf ja:Model ,
> but this was not possible.
>
> Below is my configuration file.
>
> Any help would be greatly appreciated.
>
> Best regards,
> Jeanette
>
> @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#> .
> @prefix sdb: <http://jena.hpl.hp.com/2007/sdb#> .
>
> [] rdf:type fuseki:Server ;
>
> fuseki:services ( <#tdb> ) .
>
> <#tdb> rdf:type fuseki:Service ;
> fuseki:name "tdb" ;
> fuseki:serviceQuery "sparql" ;
> fuseki:serviceUpdate "update" ;
> fuseki:dataset <#model2> ;
> .
>
> #select which set to . #use
> [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
> tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
> tdb:GraphTDB rdfs:subClassOf ja:Model .
>
> <#dataset2>
> rdf:type tdb:DatasetTDB;
> tdb:location "/home/path/tdb/sports" ;
> tdb:unionDefaultGraph true ;
> .
>
> <#model2> rdf:type ja:InfModel;
> ja:baseModel <#dataset2>;
> ja:reasoner
> [ ja:reasonerURL <http://jena.hpl.hp.com/2003/OWLFBRuleReasoner>;
> ja:schema <#interpretationSchema>
> ] .
> #<#tdbGraph> rdf:type tdb:GraphTDB; tdb:location "DB"; .
> <#interpretationSchema> a ja:MemoryModel ;
> ja:content [ ja:externalContent <file:/home/path/running.n3> ;
> ]
> .
>
Re: OWL Inferencing on TDB database in Fuseki
Posted by Jeanette Samuelsen <je...@gmail.com>.
Thanks again Andy,
I finally got it working. You made my day! :D
Cheers,
Jeanette
On Tue, Dec 10, 2013 at 7:02 PM, Andy Seaborne <an...@apache.org> wrote:
> On 10/12/13 17:41, Jeanette Samuelsen wrote:
>
>> Hello,
>>
>> I have tried to make a configuration file for Fuseki to make OWL
>> inferencing work with a TDB database. Thus far I have been able to do
>> inferencing on an empty dataset, to connect to the TDB database and do
>> queries, but not both.
>>
>> This is the error I'm currently getting:
>> "com.hp.hpl.jena.assembler.exceptions.AmbiguousSpecificTypeException:
>> cannot find a most specific type for
>> file:///home/path/jena/jena-fuseki-1.0.0/test.ttl#dataset2, which has as
>> possibilities: ja:Model tdb:DatasetTDB."
>>
>> I tried fixing the error by doing tdb:DatasetTDB rdfs:subClassOf ja:Model
>> ,
>> but this was not possible.
>>
>> Below is my configuration file.
>>
>
> At
> [[
>
> <#model2> rdf:type ja:InfModel;
> ja:baseModel <#dataset2>
> ]]
> it needs a model(=graph) not a dataset (a collection of graphs).
>
> See
> http://jena.apache.org/documentation/tdb/assembler.html#graph
>
> You need something like (untested):
>
>
> <#dataset2> rdf:type tdb:DatasetTDB ;
> tdb:location "DB" ;
>
> <#graph2> rdf:type tdb:GraphTDB ;
> tdb:dataset <#dataset2> .
>
>
> <#model2> rdf:type ja:InfModel;
> ja:baseModel <#graph2>
> ....
>
> Note ja:baseModel -> <#graph2> of type tdb:GraphTDB
>
>
>
>> Any help would be greatly appreciated.
>>
>> Best regards,
>> Jeanette
>>
>> @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#> .
>> @prefix sdb: <http://jena.hpl.hp.com/2007/sdb#> .
>>
>> [] rdf:type fuseki:Server ;
>>
>> fuseki:services ( <#tdb> ) .
>>
>> <#tdb> rdf:type fuseki:Service ;
>> fuseki:name "tdb" ;
>> fuseki:serviceQuery "sparql" ;
>> fuseki:serviceUpdate "update" ;
>> fuseki:dataset <#model2> ;
>> .
>>
>> #select which set to . #use
>> [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
>> tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
>> tdb:GraphTDB rdfs:subClassOf ja:Model .
>>
>> <#dataset2>
>> rdf:type tdb:DatasetTDB;
>> tdb:location "/home/path/tdb/sports" ;
>> tdb:unionDefaultGraph true ;
>> .
>>
>> <#model2> rdf:type ja:InfModel;
>> ja:baseModel <#dataset2>;
>> ja:reasoner
>> [ ja:reasonerURL <http://jena.hpl.hp.com/2003/OWLFBRuleReasoner>;
>> ja:schema <#interpretationSchema>
>> ] .
>> #<#tdbGraph> rdf:type tdb:GraphTDB; tdb:location "DB"; .
>> <#interpretationSchema> a ja:MemoryModel ;
>> ja:content [ ja:externalContent <file:/home/path/running.n3> ;
>> ]
>> .
>>
>>
>
Re: OWL Inferencing on TDB database in Fuseki
Posted by Andy Seaborne <an...@apache.org>.
On 10/12/13 17:41, Jeanette Samuelsen wrote:
> Hello,
>
> I have tried to make a configuration file for Fuseki to make OWL
> inferencing work with a TDB database. Thus far I have been able to do
> inferencing on an empty dataset, to connect to the TDB database and do
> queries, but not both.
>
> This is the error I'm currently getting:
> "com.hp.hpl.jena.assembler.exceptions.AmbiguousSpecificTypeException:
> cannot find a most specific type for
> file:///home/path/jena/jena-fuseki-1.0.0/test.ttl#dataset2, which has as
> possibilities: ja:Model tdb:DatasetTDB."
>
> I tried fixing the error by doing tdb:DatasetTDB rdfs:subClassOf ja:Model ,
> but this was not possible.
>
> Below is my configuration file.
At
[[
<#model2> rdf:type ja:InfModel;
ja:baseModel <#dataset2>
]]
it needs a model(=graph) not a dataset (a collection of graphs).
See
http://jena.apache.org/documentation/tdb/assembler.html#graph
You need something like (untested):
<#dataset2> rdf:type tdb:DatasetTDB ;
tdb:location "DB" ;
<#graph2> rdf:type tdb:GraphTDB ;
tdb:dataset <#dataset2> .
<#model2> rdf:type ja:InfModel;
ja:baseModel <#graph2>
....
Note ja:baseModel -> <#graph2> of type tdb:GraphTDB
>
> Any help would be greatly appreciated.
>
> Best regards,
> Jeanette
>
> @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#> .
> @prefix sdb: <http://jena.hpl.hp.com/2007/sdb#> .
>
> [] rdf:type fuseki:Server ;
>
> fuseki:services ( <#tdb> ) .
>
> <#tdb> rdf:type fuseki:Service ;
> fuseki:name "tdb" ;
> fuseki:serviceQuery "sparql" ;
> fuseki:serviceUpdate "update" ;
> fuseki:dataset <#model2> ;
> .
>
> #select which set to . #use
> [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
> tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
> tdb:GraphTDB rdfs:subClassOf ja:Model .
>
> <#dataset2>
> rdf:type tdb:DatasetTDB;
> tdb:location "/home/path/tdb/sports" ;
> tdb:unionDefaultGraph true ;
> .
>
> <#model2> rdf:type ja:InfModel;
> ja:baseModel <#dataset2>;
> ja:reasoner
> [ ja:reasonerURL <http://jena.hpl.hp.com/2003/OWLFBRuleReasoner>;
> ja:schema <#interpretationSchema>
> ] .
> #<#tdbGraph> rdf:type tdb:GraphTDB; tdb:location "DB"; .
> <#interpretationSchema> a ja:MemoryModel ;
> ja:content [ ja:externalContent <file:/home/path/running.n3> ;
> ]
> .
>