如何使用sparql访问rdf中子类的父属性？(How to access parent properties of a child class in rdf with sparql?)

如何使用sparql访问rdf中子类的父属性？(How to access parent properties of a child class in rdf with sparql?)

我正在尝试访问RDF中父类继承的属性。 我使用rdfs属性subClassOf定义了我的子类的实例。

使用乌龟语法：

ex:myClass1 a owl:class; rdfs:range xsd:integer. ex:myClass2 rdfs:subClassOf ex:myClass1. # defining instance of my class ex:instance1 ex:myClass1 1 . ex:instance2 ex:myClass2 2 .

如果我想访问所有ex：myClass1和他的孩子的属性ex：property 。 我是否可以承认ex：myClass2是ex：myClass1并编写此SPARQL查询

SELECT ?instance ?value WHERE{ ?instance ex:myClass1 ?value . }

获得我定义的两个值？ 或者rdfs：subClassOf没有将子类定义为父类的更具体的版本？

I'm trying to access to the property inherited of a parent class in RDF. I define an instance of my child class using the rdfs property subClassOf.

With a turtle syntax :

ex:myClass1 a owl:class; rdfs:range xsd:integer. ex:myClass2 rdfs:subClassOf ex:myClass1. # defining instance of my class ex:instance1 ex:myClass1 1 . ex:instance2 ex:myClass2 2 .

If I want to access to the property ex:property of all ex:myClass1 and his child. Can I admit that ex:myClass2 is a ex:myClass1 and write this SPARQL query

SELECT ?instance ?value WHERE{ ?instance ex:myClass1 ?value . }

to obtain the two values I've defined? Or rdfs:subClassOf doesn't define a child class as a more specificaly version of the parent class?

最满意答案

为了补充Joshua试图解释的内容，您正在混合模式和数据概念。

我认为你应该定义的是（在简化的RDFS语法中）：

ex:property rdfs:domain ex:myClass1 . ex:property rdfs:range xsd:integer . ex:myClass2 rdfs:subClassOf ex:myClass1. #this may be optional depending on the entailment regime your SPARQL enpoint uses ex:myClass1 a owl:class . # defining instance of my class ex:instance1 ex:property 1 . ex:instance2 ex:property 2 .

然后你可以查询

SELECT ?instance ?value WHERE{ ?instance ex:property ?value . }

根据SPARQL端点的蕴含制度，可以通过ex：属性推断出ex：instance1和ex：instance23至少是ex：Class1的实例（如果你想将其中一个作为ex：Class2，你将拥有添加三重ex:instance a ex:Class2到您的商店）

To complement what Joshua tried to explain you are mixing the schema and data concepts.

I think what you should define is (in simplified RDFS syntax):

ex:property rdfs:domain ex:myClass1 . ex:property rdfs:range xsd:integer . ex:myClass2 rdfs:subClassOf ex:myClass1. #this may be optional depending on the entailment regime your SPARQL enpoint uses ex:myClass1 a owl:class . # defining instance of my class ex:instance1 ex:property 1 . ex:instance2 ex:property 2 .

then you can query

SELECT ?instance ?value WHERE{ ?instance ex:property ?value . }

depending on the entailment regime of your SPARQL endpoint, it is inferred through the ex:property that ex:instance1 and ex:instance23 are at least instances of ex:Class1 (if you want to make one of those a ex:Class2 you will have to add the triple ex:instance a ex:Class2 to your store)