我可以使用推断和TDB配置Jena Fuseki吗?

问题描述

我想用TDB支持的推理模型来配置Fuseki.

I want to configure Fuseki with an inference model supported by TDB.

我已经能够使用内存模型进行配置，但是不能使用可以更新三元组的TDB模型进行配置.

I have been able to configure it with a Memory Model, but not with a TDB Model where I could update triples.

我正在使用以下汇编程序描述:

I am using the following assembler description:

@prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> .
@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 .

<#dataset> rdf:type ja:RDFDataset ;
       ja:defaultGraph <#infModel> .

<#infModel> a ja:InfModel ;
     ja:baseModel <#tdbGraph>; 
     ja:reasoner 
          [ja:reasonerURL <http://jena.hpl.hp.com/2003/RDFSExptRuleReasoner>].

<#tdbGraph> rdf:type tdb:GraphTDB ;
    tdb:location "DB" ;
.

它工作正常，并且能够进行RDFS推断，甚至可以插入新的三元组.但是，一旦我停止并重新启动服务器，它将引发以下异常:

It works fine and it is able to do RDFS inference and even to insert new triples. However, once I stop and restart the server, it raises the following exception:

Error 500: Invalid id node for subject (null node): ([000000000000001D], [00000000000000AF], [000000000000003D])

推荐答案

<#tdbGraph> rdf:type tdb:GraphTDB ;
    tdb:location "DB" ;
.

在第二条语句后删除分号，并以句号终止，即:

Get rid of the semi colon after the second statement and terminate with the full stop ie:

<#tdbGraph> rdf:type tdb:GraphTDB ;
        tdb:location "DB".

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