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[英]What is the best mapping.ttl file for converting xml file into RDF by using RML-Mapper library?
[英]How to map children element of an xml file using RML to create an RDF?
我想使用 RML 映射創建 RDF。 XML 部分如下所示。 我為“屬性”和“FB”制作了三重地圖。 其中一個 FB 有一個子“屬性”,但在結果中,每個“FB”三元組都有“屬性”。 是否有任何解決方案可以使子“屬性”僅對一個“FB”元素具有唯一性?
<Application ID="A4ABD8400116F035" Name="HotWater">
<SubAppNetwork>
<FB ID="3D77F5AE3E23F522" Name="HW_setpoint" Type="CAThmiInput" x="360" y="880" Namespace="nxtControl.Tutorial" />
<FB ID="38615A5C87F12AA3" Name="HW_pump1" Type="CATmotor" x="2760" y="260" Namespace="nxtControl.Tutorial" />
<FB ID="3632883FE07D2F09" Name="HW_pump2" Type="CATmotor" x="2760" y="860" Namespace="nxtControl.Tutorial">
<Parameter Name="AutoOn" Value="TRUE" />
</FB>
<FB ID="FB64994118EB2489" Name="HW_pidController" Type="CATpidController" x="1000" y="260" Namespace="nxtControl.Tutorial" />
<FB ID="1C32C8BEDD84AAA7" Name="HW_sensor" Type="CATsensor" x="360" y="260" Namespace="nxtControl.Tutorial" />
<FB ID="97DE5397424C589F" Name="HW_valve" Type="CATvalve" x="1620" y="260" Namespace="nxtControl.Tutorial" />
<FB ID="3A265436F99A7B87" Name="HW_compare" Type="COMPARE_1990CFD1468AAE4A6" x="2220" y="260" Namespace="Main">
<Attribute Name="Configuration.GenericFBType.InterfaceParams" Value="Runtime.Standard#CNT:=2;IN${CNT}:LREAL" />
<Parameter Name="IN2" Value="0.0" />
</FB>
<EventConnections>
<Connection Source="HW_sensor.CNF" Destination="HW_pidController.REQ" />
<Connection Source="HW_setpoint.CNF" Destination="HW_pidController.REQ" dx1="110.7709">
<AvoidsNodes>false</AvoidsNodes>
</Connection>
<Connection Source="HW_pidController.CNF" Destination="HW_valve.REQ" />
<Connection Source="HW_valve.CNF" Destination="HW_compare.REQ" />
<Connection Source="HW_compare.CNF" Destination="HW_pump1.REQ" />
</EventConnections>
<DataConnections>
<Connection Source="HW_sensor.outValue" Destination="HW_pidController.pv" dx1="41.3125" />
<Connection Source="HW_setpoint.value" Destination="HW_pidController.sp" dx1="170.7709">
<AvoidsNodes>false</AvoidsNodes>
</Connection>
<Connection Source="HW_pidController.cp" Destination="HW_valve.AutoSP" />
<Connection Source="HW_compare.GT" Destination="HW_pump1.AutoOn" dx1="70" />
<Connection Source="HW_valve.cp" Destination="HW_compare.IN1" />
</DataConnections>
</SubAppNetwork>
映射:
<#AttributeMapping>
a rr:TriplesMap;
rml:logicalSource [
rml:source "System.xml" ;
rml:iterator "/System/Application/SubAppNetwork/FB/Attribute";
rml:referenceFormulation ql:XPath
];
rr:subjectMap [
rr:template "http://sth/example#/SubAppNetwork/FB/Attribute-{@Name}";
rr:class iec61499:Attribute
];
rr:predicateObjectMap [
rr:predicate iec61499:hasName;
rr:objectMap [
rml:reference "@Name"
];
];
rr:predicateObjectMap [
rr:predicate iec61499:hasValue;
rr:objectMap [
rml:reference "@Value"
];
].
<#FBMapping>
a rr:TriplesMap;
rml:logicalSource [
rml:source "System.xml" ;
rml:iterator "/System/Application/SubAppNetwork/FB";
rml:referenceFormulation ql:XPath
];
rr:subjectMap [
rr:template "http://sth/example#/SubAppNetwork/FB-{../../../@Name}-{@ID}";
rr:class iec61499:FB
];
rr:predicateObjectMap [
rr:predicate iec61499:hasID;
rr:objectMap [
rml:reference "@ID"
];
];
rr:predicateObjectMap [
rr:predicate iec61499:hasName;
rr:objectMap [
rml:reference "@Name"
];
];
rr:predicateObjectMap [
rr:predicate iec61499:hasType;
rr:objectMap [
rml:reference "@Type"
];
];
rr:predicateObjectMap [
rr:predicate iec61499:hasX;
rr:objectMap [
rml:reference "@x"
];
];
rr:predicateObjectMap [
rr:predicate iec61499:hasY;
rr:objectMap [
rml:reference "@y"
];
];
rr:predicateObjectMap [
rr:predicate iec61499:hasNamespace;
rr:objectMap [
rml:reference "@Namespace"
];
];
rr:predicateObjectMap [
rr:predicate iec61499:hasAttribute;
rr:objectMap [
rr:parentTriplesMap <#AttributeMapping>
];
].
您可以使用rr:joinCondition
在 RML rr:joinCondition
:
rr:predicateObjectMap [
rr:predicate iec61499:hasAttribute;
rr:objectMap [
rr:parentTriplesMap <#AttributeMapping>;
rr:joinCondition [
rr:child "@Name";
rr:parent "../@Name"
];
];
].
rr:joinCondition
將確保僅當rr:child
和rr:parent
彼此相等時才進行連接。
我修改了您的數據,因為 XML 無效, </Application>
結束標記丟失,您可以在下面找到新數據:
<Application ID="A4ABD8400116F035" Name="HotWater">
<SubAppNetwork>
<FB ID="3D77F5AE3E23F522" Name="HW_setpoint" Type="CAThmiInput" x="360" y="880" Namespace="nxtControl.Tutorial" />
<FB ID="38615A5C87F12AA3" Name="HW_pump1" Type="CATmotor" x="2760" y="260" Namespace="nxtControl.Tutorial" />
<FB ID="3632883FE07D2F09" Name="HW_pump2" Type="CATmotor" x="2760" y="860" Namespace="nxtControl.Tutorial">
<Parameter Name="AutoOn" Value="TRUE" />
</FB>
<FB ID="FB64994118EB2489" Name="HW_pidController" Type="CATpidController" x="1000" y="260" Namespace="nxtControl.Tutorial" />
<FB ID="1C32C8BEDD84AAA7" Name="HW_sensor" Type="CATsensor" x="360" y="260" Namespace="nxtControl.Tutorial" />
<FB ID="97DE5397424C589F" Name="HW_valve" Type="CATvalve" x="1620" y="260" Namespace="nxtControl.Tutorial" />
<FB ID="3A265436F99A7B87" Name="HW_compare" Type="COMPARE_1990CFD1468AAE4A6" x="2220" y="260" Namespace="Main">
<Attribute Name="Configuration.GenericFBType.InterfaceParams" Value="Runtime.Standard#CNT:=2;IN${CNT}:LREAL" />
<Parameter Name="IN2" Value="0.0" />
</FB>
<EventConnections>
<Connection Source="HW_sensor.CNF" Destination="HW_pidController.REQ" />
<Connection Source="HW_setpoint.CNF" Destination="HW_pidController.REQ" dx1="110.7709">
<AvoidsNodes>false</AvoidsNodes>
</Connection>
<Connection Source="HW_pidController.CNF" Destination="HW_valve.REQ" />
<Connection Source="HW_valve.CNF" Destination="HW_compare.REQ" />
<Connection Source="HW_compare.CNF" Destination="HW_pump1.REQ" />
</EventConnections>
<DataConnections>
<Connection Source="HW_sensor.outValue" Destination="HW_pidController.pv" dx1="41.3125" />
<Connection Source="HW_setpoint.value" Destination="HW_pidController.sp" dx1="170.7709">
<AvoidsNodes>false</AvoidsNodes>
</Connection>
<Connection Source="HW_pidController.cp" Destination="HW_valve.AutoSP" />
<Connection Source="HW_compare.GT" Destination="HW_pump1.AutoOn" dx1="70" />
<Connection Source="HW_valve.cp" Destination="HW_compare.IN1" />
</DataConnections>
</SubAppNetwork>
</Application>
我將您的示例減少到最低限度,並添加了rr:joinCondition
以僅在FB
的Name
屬性與父級及其子級匹配時才執行連接:
@base <http://example.org/> .
@prefix rml: <http://semweb.mmlab.be/ns/rml#> .
@prefix rr: <http://www.w3.org/ns/r2rml#> .
@prefix ql: <http://semweb.mmlab.be/ns/ql#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix schema: <http://schema.org/> .
@prefix dbo: <http://dbpedia.org/ontology/> .
@prefix iec61499: <http://example.org/iec61499/> .
<#AttributeMapping>
a rr:TriplesMap;
rml:logicalSource [
rml:source "System.xml";
rml:referenceFormulation ql:XPath;
rml:iterator "/Application/SubAppNetwork/FB/Attribute"
];
rr:subjectMap [
rr:template "http://sth/example#/SubAppNetwork/FB/Attribute-{@Name}";
rr:class iec61499:Attribute
];
rr:predicateObjectMap [
rr:predicate iec61499:hasName;
rr:objectMap [
rml:reference "@Name"
];
].
<#FBMapping>
a rr:TriplesMap;
rml:logicalSource [
rml:source "System.xml" ;
rml:iterator "/Application/SubAppNetwork/FB";
rml:referenceFormulation ql:XPath
];
rr:subjectMap [
rr:template "http://sth/example#/SubAppNetwork/FB-{../../@Name}-{@ID}";
rr:class iec61499:FB
];
rr:predicateObjectMap [
rr:predicate iec61499:hasName;
rr:objectMap [
rml:reference "@Name"
];
];
rr:predicateObjectMap [
rr:predicate iec61499:hasAttribute;
rr:objectMap [
rr:parentTriplesMap <#AttributeMapping>;
rr:joinCondition [
rr:child "@Name";
rr:parent "../@Name"
];
];
].
如果您向 RML 處理器提供這些映射和數據,您將獲得以下輸出:
<http://sth/example#/SubAppNetwork/FB/Attribute-Configuration.GenericFBType.InterfaceParams> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/iec61499/Attribute>.
<http://sth/example#/SubAppNetwork/FB/Attribute-Configuration.GenericFBType.InterfaceParams> <http://example.org/iec61499/hasName> "Configuration.GenericFBType.InterfaceParams".
<http://sth/example#/SubAppNetwork/FB-HotWater-3D77F5AE3E23F522> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/iec61499/FB>.
<http://sth/example#/SubAppNetwork/FB-HotWater-3D77F5AE3E23F522> <http://example.org/iec61499/hasName> "HW_setpoint".
<http://sth/example#/SubAppNetwork/FB-HotWater-38615A5C87F12AA3> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/iec61499/FB>.
<http://sth/example#/SubAppNetwork/FB-HotWater-38615A5C87F12AA3> <http://example.org/iec61499/hasName> "HW_pump1".
<http://sth/example#/SubAppNetwork/FB-HotWater-3632883FE07D2F09> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/iec61499/FB>.
<http://sth/example#/SubAppNetwork/FB-HotWater-3632883FE07D2F09> <http://example.org/iec61499/hasName> "HW_pump2".
<http://sth/example#/SubAppNetwork/FB-HotWater-FB64994118EB2489> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/iec61499/FB>.
<http://sth/example#/SubAppNetwork/FB-HotWater-FB64994118EB2489> <http://example.org/iec61499/hasName> "HW_pidController".
<http://sth/example#/SubAppNetwork/FB-HotWater-1C32C8BEDD84AAA7> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/iec61499/FB>.
<http://sth/example#/SubAppNetwork/FB-HotWater-1C32C8BEDD84AAA7> <http://example.org/iec61499/hasName> "HW_sensor".
<http://sth/example#/SubAppNetwork/FB-HotWater-97DE5397424C589F> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/iec61499/FB>.
<http://sth/example#/SubAppNetwork/FB-HotWater-97DE5397424C589F> <http://example.org/iec61499/hasName> "HW_valve".
<http://sth/example#/SubAppNetwork/FB-HotWater-3A265436F99A7B87> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/iec61499/FB>.
<http://sth/example#/SubAppNetwork/FB-HotWater-3A265436F99A7B87> <http://example.org/iec61499/hasName> "HW_compare".
<http://sth/example#/SubAppNetwork/FB-HotWater-3A265436F99A7B87> <http://example.org/iec61499/hasAttribute> <http://sth/example#/SubAppNetwork/FB/Attribute-Configuration.GenericFBType.InterfaceParams>.
注意:我為 RML 及其技術做出了貢獻。
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