【发布时间】:2019-01-08 22:30:26
【问题描述】:
我想查询特定个人的所有数据属性。
我在本体中定义的数据属性
在我的本体中,我定义了数据属性树。
要查询的目标个体
我的目标个体在我的猫头鹰中,定义如下:
<owl:NamedIndividual rdf:about="http://www.owl.de/ontology/i40component-01#I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest">
<rdf:type rdf:resource="http://www.owl.de/ontology/i40component-01#Manifest"/>
<decription rdf:datatype="http://www.w3.org/2001/XMLSchema#string">An example work cell.</decription>
<ele rdf:datatype="http://www.w3.org/2001/XMLSchema#string">35.0</ele>
<lat rdf:datatype="http://www.w3.org/2001/XMLSchema#string">52.518611</lat>
<lon rdf:datatype="http://www.w3.org/2001/XMLSchema#string">13.376111</lon>
<name rdf:datatype="http://www.w3.org/2001/XMLSchema#string">I40 Work Cell 1</name>
<production_date rdf:datatype="http://www.w3.org/2001/XMLSchema#string">2012-12-31T23:57:00</production_date>
<uuid rdf:datatype="http://www.w3.org/2001/XMLSchema#string">e41bdfaa-7163-46ed-8cb3-350fa226bbaf</uuid>
</owl:NamedIndividual>
在 Protege 中它看起来像:
目标结果
目标/目的是查询 Protege 或 OWL sn-p 中显示的所有已定义数据属性。此查询的预期结果应该是:
----------------------------------------------------------------------------------------------------------------------------------------------------------
| I40Component | dataProperty | datatypeValue |
==========================================================================================================================================================
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:uuid | "e41bdfaa-7163-46ed-8cb3-350fa226bbaf" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:production_date | "2012-12-31T23:57:00" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:name | "I40 Work Cell 1" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:lon | "13.376111" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:lat | "52.518611" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:ele | "35.0" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:decription | "An example work cell." |
----------------------------------------------------------------------------------------------------------------------------------------------------------
我当前的 SPARQL 查询和结果
我当前的测试方法如下所示。它构建并执行一个 SPARQL 查询。
@Test
public void showDataPropertiesOfWholeManifest() {
SelectBuilder sb = new SelectBuilder() //Building a Query template
.addPrefix("i40comp", owl.getI40NameSpace() + "#")
.addPrefix("rdfs", "http://www.w3.org/2000/01/rdf-schema#")
.addPrefix("xsd", "http://www.w3.org/2001/XMLSchema#")
.addPrefix("owl", "http://www.w3.org/2002/07/owl#")
.addPrefix("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
//Define Variables
sb.addVar("?I40Component");
sb.addVar("?dataProperty");
sb.addVar("?datatypeValue");
//Find Individuals for Type "Manifest"
sb.addWhere("?I40Component", "rdf:type", URI.generateSparqlURI(I40VOC.Classes.AssetAdministrationShell.Manifest));
//Find Individual with UUID "e41bdfaa-7163-46ed-8cb3-350fa226bbaf"
sb.addWhere("?I40Component", "i40comp:uuid", "e41bdfaa-7163-46ed-8cb3-350fa226bbaf"); //Filter I40Component
//Get all properties of this individual
sb.addWhere("?dataProperty", "?", "owl:DatatypeProperty");
// Results preparation
sb.addWhere("?I40Component", "?dataProperty", "?datatypeValue");
//Filters blanks and literals
try {
sb.addFilter("!isBlank(?datatypeValue)");
sb.addFilter("isLiteral(?datatypeValue)");
} catch (ParseException e) {
e.printStackTrace();
}
//Build query and print result
Query q = sb.build();
executeSPARQLqueryAndPrintResult(q);
}
或者再次作为查询字符串:
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX i40comp: <http://www.owl.de/ontology/i40component-01#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT ?I40Component ?dataProperty ?datatypeValue
WHERE
{ ?I40Component
rdf:type i40comp:Manifest ;
i40comp:uuid "e41bdfaa-7163-46ed-8cb3-350fa226bbaf" .
?dataProperty
? owl:DatatypeProperty .
?I40Component
?dataProperty ?datatypeValue
FILTER ( ! isBlank(?datatypeValue) )
FILTER isLiteral(?datatypeValue)
}
不幸的是,结果不是我需要的结果。查看以下结果:
----------------------------------------------------------------------------------------------------------------------------------------------------------
| I40Component | dataProperty | datatypeValue |
==========================================================================================================================================================
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:uuid | "e41bdfaa-7163-46ed-8cb3-350fa226bbaf" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:production_date | "2012-12-31T23:57:00" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:name | "I40 Work Cell 1" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:lon | "13.376111" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:lat | "52.518611" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:ele | "35.0" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:decription | "An example work cell." |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:aas | "52.518611" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:manifest | "52.518611" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:aas | "An example work cell." |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:aas | "I40 Work Cell 1" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:aas | "2012-12-31T23:57:00" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:aas | "35.0" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:manifest | "35.0" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:aas | "e41bdfaa-7163-46ed-8cb3-350fa226bbaf" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:aas | "13.376111" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:manifest | "13.376111" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:manifest | "e41bdfaa-7163-46ed-8cb3-350fa226bbaf" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:manifest | "2012-12-31T23:57:00" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:manifest | "An example work cell." |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:manifest | "I40 Work Cell 1" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:wpt_gps_location | "52.518611" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:wpt_gps_location | "35.0" |
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:wpt_gps_location | "13.376111" |
----------------------------------------------------------------------------------------------------------------------------------------------------------
SPARQL 查询不知何故进入“上层数据属性”并选择它们作为结果并打印实际子属性的值。 喜欢:
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:wpt_gps_location | "52.518611" |
应该是正常的:
| i40comp:I40Component_e41bdfaa-7163-46ed-8cb3-350fa226bbaf_I40WorkCell1_AASmanifest | i40comp:lat | "52.518611" |
也许你们中的某个人可以向我解释为什么会发生这种情况,并且还可以通过改进查询来支持我以获得目标结果。
【问题讨论】:
-
那行显然是错误的:
sb.addWhere("?dataProperty", "?", "owl:DatatypeProperty");- 查询解析器肯定会失败。它必须是rdf:type作为谓词 -
查询结果有什么问题?我的意思是,这显然是由于推理。所以我的猜测 - 你没有显示你使用的模型类型 - 你正在使用推理模型。我对吗?你知道什么是推理吗?我只想要断言的数据,最简单的情况是使用默认模型并将数据加载到这个模型中
-
顺便说一句,RDF 和 OWL 支持的数据类型不仅仅是
xsd:string... -
嗨@AKSW,(1.)关于您的第一条评论:我没有收到任何错误消息,并且在我更改“?”后结果没有改变到“rdf:类型”。但感谢您的提示,以后我将使用“rdf:type”。 (2.) 关于你的第二条命令。非常感谢这个消息,你是完全正确的。我将
OntModel mONT = ModelFactory.createOntologyModel();更改为mONT= ModelFactory.createDefaultModel();,然后我得到了目标结果。我是本体领域的新手,必须学习推理的东西。 (3.) 关于您的第三条评论:谢谢!我将更改数据类型,例如GPS坐标