chrisanun opened a new issue, #3572: URL: https://github.com/apache/jena/issues/3572
### Version 5.6.0 ### What happened? I created an assembler file which produces the error below (config used included). The schema I wish to use for inference is called `Schema_Ontology.ttl` but whenever the relevant line is un-commented I receive the error at the bottom. I'm not sure if this is a bug or my configuration is wrong. Any assistance will be appreciated! ## Assembler (example.ttl) ```ttl # Fuseki 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 tdb2: <http://jena.apache.org/2016/tdb#> PREFIX ja: <http://jena.hpl.hp.com/2005/11/Assembler#> [] rdf:type fuseki:Server ; fuseki:services ( <#read_write_service> <#read_only_service> ) . # Writable service - direct access to TDB dataset <#read_write_service> rdf:type fuseki:Service ; rdfs:label "Example TDB2 Service (RW)" ; fuseki:name "tdb2-database" ; fuseki:serviceQuery "query" ; fuseki:serviceQuery "sparql" ; fuseki:serviceUpdate "update" ; fuseki:serviceReadWriteGraphStore "data" ; fuseki:serviceReadGraphStore "get" ; fuseki:dataset <#tdb_dataset_readwrite> ; . # Read-only service - access via inference model <#read_only_service> rdf:type fuseki:Service ; rdfs:label "Example TDB2 Service (RO with Inference)" ; fuseki:name "tdb2-inference" ; fuseki:serviceQuery "query" ; fuseki:serviceQuery "sparql" ; fuseki:serviceReadGraphStore "get" ; fuseki:dataset <#inference_dataset> ; . # Dataset wrapper for inference model <#inference_dataset> rdf:type ja:RDFDataset ; ja:defaultGraph <#inference_model> ; . # Inference model that reads from TDB graph <#inference_model> rdf:type ja:InfModel ; ja:baseModel <#tdb_base_graph> ; ja:reasoner [ ja:reasonerURL <http://jena.hpl.hp.com/2003/OWLFBRuleReasoner> ] ; ja:schema <file:///fuseki/data/schema/Schema_Ontology.ttl> . # TDB graph (model) - this is the key change <#tdb_base_graph> rdf:type tdb2:GraphTDB ; tdb2:dataset <#tdb_dataset_readwrite> ; . # The underlying TDB dataset storage <#tdb_dataset_readwrite> rdf:type tdb2:DatasetTDB ; tdb2:location "Example" ; . ``` ## Error ``` PS C:\Users\Username\Documents\projects\rdf\jena-fuseki-docker-5.6.0> docker-compose run --rm --name BuildingModels --service-ports fuseki --update time="2025-11-08T10:01:35+11:00" level=warning msg="C:\\Users\\Username\\Documents\\projects\\rdf\\jena-fuseki-docker-5.6.0\\docker-compose.yaml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion" [2025-11-07 23:01:37] INFO Config :: Fuseki Base = /fuseki/run [2025-11-07 23:01:37] INFO Config :: Load configuration: file:///fuseki/run/configuration/example2.ttl Exception in thread "main" org.apache.jena.assembler.exceptions.AmbiguousSpecificTypeException: cannot find a most specific type for :inference_model, which has as possibilities: ja:InfModel ja:ReasonerFactory. doing: root: file:///fuseki/run/configuration/example2.ttl#inference_dataset with type: http://jena.hpl.hp.com/2005/11/Assembler#RDFDataset assembler class: class org.apache.jena.sparql.core.assembler.DatasetAssemblerGeneral at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.open(AssemblerGroup.java:145) at org.apache.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:96) at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:39) at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:35) at org.apache.jena.assembler.assemblers.AssemblerGroup.openModel(AssemblerGroup.java:44) at org.apache.jena.sparql.core.assembler.DatasetAssemblerGeneral.createDataset(DatasetAssemblerGeneral.java:53) at org.apache.jena.sparql.core.assembler.NamedDatasetAssembler.createNamedDataset(NamedDatasetAssembler.java:49) at org.apache.jena.sparql.core.assembler.DatasetAssembler.open(DatasetAssembler.java:42) at org.apache.jena.sparql.core.assembler.DatasetAssembler.open(DatasetAssembler.java:33) at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.openBySpecificType(AssemblerGroup.java:160) at org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.open(AssemblerGroup.java:147) at org.apache.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.open(AssemblerGroup.java:96) at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:39) at org.apache.jena.assembler.assemblers.AssemblerBase.open(AssemblerBase.java:35) at org.apache.jena.fuseki.build.FusekiConfig.getDataset(FusekiConfig.java:694) at org.apache.jena.fuseki.build.FusekiConfig.buildDataService(FusekiConfig.java:443) at org.apache.jena.fuseki.build.FusekiConfig.buildDataAccessPoint(FusekiConfig.java:431) at org.apache.jena.fuseki.build.FusekiConfig.readConfiguration(FusekiConfig.java:408) at org.apache.jena.fuseki.build.FusekiConfig.readConfigurationDirectory(FusekiConfig.java:386) at org.apache.jena.fuseki.mod.admin.FMod_Admin.prepare(FMod_Admin.java:149) at org.apache.jena.fuseki.main.sys.FusekiModuleStep.lambda$prepare$0(FusekiModuleStep.java:38) at java.base/java.lang.Iterable.forEach(Unknown Source) at org.apache.jena.fuseki.main.sys.FusekiModules.forEach(FusekiModules.java:106) at org.apache.jena.fuseki.main.sys.FusekiModuleStep.prepare(FusekiModuleStep.java:38) at org.apache.jena.fuseki.main.FusekiServer$Builder.build(FusekiServer.java:1389) at org.apache.jena.fuseki.server.FusekiServerRunner.construct(FusekiServerRunner.java:79) at org.apache.jena.fuseki.main.cmds.FusekiServerCmd.main(FusekiServerCmd.java:50) ``` ### Relevant output and stacktrace ```shell ``` ### Are you interested in making a pull request? 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