urn:x-arq:UnionGraph should work.
Maybe try with a simpler setup first:
<#service>
rdf:type fuseki:Service ;
fuseki:name "ds" ;
fuseki:endpoint [
fuseki:operation fuseki:query ;
fuseki:name "sparql" ] ;
fuseki:endpoint [ fuseki:operation fuseki:query ] ;
fuseki:dataset <#dataset> .
<#dataset> rdf:type ja:RDFDataset ;
ja:defaultGraph <#tdbGraph> ;
.
<#tdbGraph> rdf:type tdb:GraphTDB ;
tdb:dataset <#tdbDataset> ;
tdb:graphName "urn:x-arq:UnionGraph" ;
.
<#tdbDataset> rdf:type tdb:DatasetTDB ;
tdb:location "DB" ;
.
which worked for me.
Andy
On 08/11/2020 21:51, Kamel HOUCHAT wrote:
Hello,
Context
i am new to fuseki, i am currently using it in a project, the main idea is:
* start the server with a pre-defined ontology (turtle file) + a reasoner
* I process files with python, and for each file, I generate an rdf graph
that I put in a named graph
* finally, I would like to query on all the subgraphs
My current configuration
@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 (
<#lmdrservice>
) .
# TDB
tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
tdb:GraphTDB rdfs:subClassOf ja:Model .
<#lmdrservice> rdf:type fuseki:Service ;
fuseki:name "lmdr" ; # http://host/inf
fuseki:serviceQuery "query" , "sparql" ;
fuseki:serviceUpdate "update" ;
fuseki:serviceUpload "upload" ;
fuseki:serviceReadWriteGraphStore "data" ;
fuseki:serviceReadGraphStore "get" ;
fuseki:dataset <#dataset> ;
.
<#dataset> rdf:type ja:RDFDataset ;
ja:defaultGraph <#model> ;
ja:namedGraph
[ ja:graphName <http://www.example.com/ontology> ;
ja:graph <#ontology> ] ;
.
<#ontology> rdf:type ja:MemoryModel ;
ja:content [ja:externalContent <file:/fuseki/lmdr.ttl> ] ;
.
<#model> a ja:InfModel ;
ja:baseModel <#tdbGraph> ;
ja:reasoner [
ja:rulesFrom <file:/fuseki/configuration/lmdr_rules.rules> ;
] ;
.
<#tdbGraph> rdf:type tdb:GraphTDB ;
tdb:dataset <#tdbDataset>
.
<#tdbDataset> rdf:type tdb:DatasetTDB ;
tdb:location "/fuseki/databases/lmdr" ;
tdb:unionDefaultGraph true
.
What doesn't work
Sparql queries are not executed on all named graphs,the problem probably comes
from the argument :
tdb:unionDefaultGraph true
Yes - that is done on a query, but not on graph extracted from a database.
What i've tried
I tried many other different configurations, for example:
* specify this in the server description part
fuseki:endpoint [
fuseki:operation fuseki:query ;
fuseki:name "sparql-union" ;
ja:context [ ja:cxtName "tdb:unionDefaultGraph" ; ja:cxtValue true ] ;
] ;
* Using urn:x-arq:UnionGraph as the name of the graph, which means that it
is the union of the named graphs
:g rdf:type tdb:GraphTDB ;
tdb:dataset :tdbDataset ;
tdb:graphName <urn:x-arq:UnionGraph> ;
.
