On Fri, 2011-09-16 at 14:56 +0000, David Jordan wrote:
> This should be easy…
> I have the following assembler file.
>
> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
> @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
> @prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> .
> @prefix sdb: <http://jena.hpl.hp.com/2007/sdb#> .
> @prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> .
>
> [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
> tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
> tdb:GraphTDB rdfs:subClassOf ja:Model .
>
> <#tdbstore> rdf:type tdb:DatasetTDB ;
> tdb:location "DB" ;
> .
>
> <#ICD9> rdf:type tdb:GraphTDB ;
> tdb:graphName <http://purl.bioontology.org/ontology/HOM_ICD9/> ;
> tdb:dataset <#tdbstore> ;
> .
>
> With the following Java code:
>
> Model assemblerSpec = FileManager.get().loadModel( "db.ttl" );
> Resource root = assemblerSpec.createResource(
> assemblerSpec.expandPrefix( "ICD9" ) );
> Model model = Assembler.general.openModel( root );
>
> An exception is thrown on the 3rd line (the assemblerSpec and root are not
> null):
> Exception in thread "main"
> com.hp.hpl.jena.assembler.exceptions.NoSpecificTypeException: the root ICD9
> has no most specific type that is a subclass of ja:Object
> at
> com.hp.hpl.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.open(AssemblerGroup.java:101)
> at
> com.hp.hpl.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:69)
> at
> com.hp.hpl.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:37)
> at
> com.hp.hpl.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:34)
> at
> com.hp.hpl.jena.assembler.assemblers.AssemblerGroup.openModel(AssemblerGroup.java:23)
> at com.sas.hls.hoa.ontology.Test.main(Test.java:18)
>
>
> ICD9 is a tdb:GraphTDB, (its most specific type)
> tdb:GraphTDB rdfs:subClassOf ja:Model,
> ja:Model is a subclass of ja:Object.
>
> So why would this be occurring?
You are not referring to the #ICD9 you think you are :)
In your assembler file you have no base specified so the relative URI
#ICD9 will become something like:
<file:/path/to/assembler/file#ICD9>
Whereas the thing you are passing to createResource to generate root is
totally different and won't match up.
I would suggest using an explicit prefix in your assembler file:
@prefix eg: <http://some/useful/URI#> .
eg:ICD9 rdf:type tdb:GraphTDB ;
tdb:graphName <http://purl.bioontology.org/ontology/HOM_ICD9/> ;
tdb:dataset <#tdbstore> ;
.
Then you can find the root by:
Resource root =
assemblerSpec.createResource( assemblerSpec.expandPrefix( "eg:ICD9" ) );
Dave
