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我有一个带有 ash:SPARQLTarget和 a的 Nodeshape sh:SPARQLRule。我尝试将 Target 和 Rule 作为查询运行并且都提供结果,但是当我使用 Apache Jena SHACL 处理器执行 Shapes 时,它不会构造任何三元组。我做错什么了吗?我没主意了。这是我的节点形状:

iep:hasKG331
a rdf:Property, sh:NodeShape ;
sh:Target [
    a sh:SPARQLTarget ;
          sh:select """
            PREFIX express: <https://w3id.org/express#>
            PREFIX ifcowl: <http://standards.buildingsmart.org/IFC/DEV/IFC4/ADD1/OWL#>
            PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
            PREFIX iep: <https://www.inf.bi.rub.de/semweb/ns/ifc-enrichment-procedure/iep#>

            SELECT ?this
            WHERE {
                ?this rdf:type ifcowl:IfcWallStandardCase .
                ?relDefinesByProperties ifcowl:relatedObjects_IfcRelDefines ?this .
                ?relDefinesByProperties ifcowl:relatingPropertyDefinition_IfcRelDefinesByProperties ?pset .
                }
          """ ;

    ] ;
sh:rule [
    a sh:SPARQLRule ;
        sh:construct """
        PREFIX express: <https://w3id.org/express#>
        PREFIX ifcowl: <http://standards.buildingsmart.org/IFC/DEV/IFC4/ADD1/OWL#>
        PREFIX iep: <xxx/ifc-enrichment-procedure/iep#>

        CONSTRUCT {
            $this iep:hasKG iep:hasKG331 .
        }
        WHERE {
            ?relDBP ifcowl:relatedObjects_IfcRelDefines $this .
            ?relDBP ifcowl:relatingPropertyDefinition_IfcRelDefinesByProperties ?propSet .
            ?propSet ifcowl:hasProperties_IfcPropertySet ?psv1 .
            ?propSet ifcowl:hasProperties_IfcPropertySet ?psv2 .
            ?psv1 iep:isExternal true .
            ?psv2 iep:isLoadBearing true .
        }
    """ ;
] .

正如我所提到的,当我将目标或规则作为单个查询执行时,我确实得到了结果,并且目标中的焦点节点确实像$this规则中一样出现。IRIiep:isExternaliep:isLoadBearing在之前的步骤中得到了推断。我错过了什么吗?

4

1 回答 1

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不看细节,sh:Target 需要是小写 t 的 sh:target。所有属性名称通常都是小写的。

于 2021-01-29T00:44:57.977 回答