SPARQL REGEX 运行但不显示任何内容

Question

我的烹饪食谱中有两个 Class ontology :

<Class rdf:about="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes">
    <equivalentClass>
        <Restriction>
            <onProperty rdf:resource="&SouthSulawesiCulinaryRecipes;NumberOfIngredientsRequired"/>
            <minQualifiedCardinality rdf:datatype="&xsd;nonNegativeInteger">1</minQualifiedCardinality>
            <onDataRange rdf:resource="&xsd;int"/>
        </Restriction>
    </equivalentClass>
    <equivalentClass>
        <Restriction>
            <onProperty rdf:resource="&SouthSulawesiCulinaryRecipes;UsesTools"/>
            <onClass rdf:resource="&SouthSulawesiCulinaryRecipes;KitchenEquipment"/>
            <minQualifiedCardinality rdf:datatype="&xsd;nonNegativeInteger">1</minQualifiedCardinality>
        </Restriction>
    </equivalentClass>
</Class> 

<Class rdf:about="&SouthSulawesiCulinaryRecipes;Place"/>

这是对象属性：

<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#HasIngredients -->

     <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeverages"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#HasRecipe -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;HasRecipe">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;Place"/>
    <rdfs:subPropertyOf rdf:resource="&owl;topObjectProperty"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#IngR -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;IngR">
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <inverseOf rdf:resource="&SouthSulawesiCulinaryRecipes;Relation_Of"/>
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#Ing_Type -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;Ing_Type">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;IngType"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#IngredientUsedToMake -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;IngredientUsedToMake">
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeverages"/>
    <inverseOf rdf:resource="&SouthSulawesiCulinaryRecipes;HasIngredients"/>
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#MeasurementUnit -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;MeasurementUnit">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;CookingMeasurements"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#RecipeOrigin -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;RecipeOrigin">
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <inverseOf rdf:resource="&SouthSulawesiCulinaryRecipes;HasRecipe"/>
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;Place"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#Relation_Of -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;Relation_Of">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#ToolsUsedByRecipe -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;ToolsUsedByRecipe">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;KitchenEquipment"/>
    <inverseOf rdf:resource="&SouthSulawesiCulinaryRecipes;UsesTools"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#UsesTools -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;UsesTools">
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;KitchenEquipment"/>
</ObjectProperty> here

起初，我有这个查询来获取我 ontology

中的所有食谱

SELECT   ?FoodAndBeveragesRecipes
   WHERE {
         ?Place :HasRecipe ?FoodAndBeveragesRecipes 
    }

结果是：

CotoMakassar

Saraba

EsPisangIjo

PalluMata

DanpoGoreng

DanpoRebus

SambalMangga

现在我正在尝试运行这个查询以获取所有食谱名称为“Danpo”的数据集（我不知道是否有其他代码比这个更简单，如果你知道请也告诉我）：

SELECT   ?FoodAndBeveragesRecipes
   WHERE {
         ?Place :HasRecipe ?FoodAndBeveragesRecipes .
        FILTER regex (?FoodAndBeveragesRecipes ,"Danpo", "i")
    }

查询是运行ning 但它是空的，我没有得到我的数据，我认为没有错误。我想知道为什么我的过滤器不能正常工作？我应该怎么做才能在我的正则表达式中获取与我的关键字完全相同的数据集？有人可以帮助我吗？

谢谢。

Answer 1

我很确定这是 Extract triples containing particular substring using SPARQL 的副本，我已将其标记为副本，但在此处提供更多解释可能也会有所帮助。 hasRecipe 属性是一个 对象属性。这意味着它的对象应该是个体，这意味着它们将是 IRI。 regex 函数需要一个字符串作为参数。如果要将正则表达式与 IRI 的文本进行匹配，则需要使用 str 函数：

FILTER regex (str(?FoodAndBeveragesRecipes) ,"Danpo", "i")

就是说，如果您只想检查它是否包含字符串，并且您使用的是 SPARQL 1.1，则可以使用 contains:

filter contains(str(?FoodAndBeveragesRecipes), "Danpo")

SPARQL REGEX 运行但不显示任何内容

SPARQL REGEX running but does not show anything

regex

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SPARQL REGEX 运行 但不显示任何内容

SPARQL REGEX running but does not show anything

regex

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sparql

jena

SPARQL REGEX 运行但不显示任何内容