Question

我是Protege / OWL的初学者，我无法理解为什么最大基数正常工作且最小基数不行。我尝试了Hermit Pellet和Fact作为reasoners。我知道Open World Assumtion，但这对我来说似乎不合逻辑。

我想表达婚姻事件中必须至少有2个人。

课程：MarriageEvent

EquivalentTo：

这有效： MarriageEvent and is_event_of max 2 Person

而这不是： MarriageEvent and is_event_of min 2 Person

所有人都被宣布为不同的人。

我的本体论：

 <?xml version="1.0"?>
 <Ontology xmlns="http://www.w3.org/2002/07/owl#"
 xml:base="http://www.semanticweb.org/anato/ontologies/2017/7/untitled-ontology-184"
 xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
 xmlns:xml="http://www.w3.org/XML/1998/namespace"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
 xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
 ontologyIRI="http://www.semanticweb.org/anato/ontologies/2017/7/untitled-ontology-184">
<Prefix name="owl" IRI="http://www.w3.org/2002/07/owl#"/>
<Prefix name="rdf" IRI="http://www.w3.org/1999/02/22-rdf-syntax-ns#"/>
<Prefix name="xml" IRI="http://www.w3.org/XML/1998/namespace"/>
<Prefix name="xsd" IRI="http://www.w3.org/2001/XMLSchema#"/>
<Prefix name="rdfs" IRI="http://www.w3.org/2000/01/rdf-schema#"/>
<Declaration>
    <NamedIndividual IRI="#Peter"/>
</Declaration>
<Declaration>
    <NamedIndividual IRI="#Julia"/>
</Declaration>
<Declaration>
    <ObjectProperty IRI="#is_event_of"/>
</Declaration>
<Declaration>
    <NamedIndividual IRI="#Max"/>
</Declaration>
<Declaration>
    <Class IRI="#Person"/>
</Declaration>
<Declaration>
    <NamedIndividual IRI="#Event_Marriage"/>
</Declaration>
<Declaration>
    <Class IRI="#MarriageEvent"/>
</Declaration>
<EquivalentClasses>
    <Class IRI="#MarriageEvent"/>
    <ObjectIntersectionOf>
        <Class IRI="#MarriageEvent"/>
        <ObjectMinCardinality cardinality="2">
            <ObjectProperty IRI="#is_event_of"/>
            <Class IRI="#Person"/>
        </ObjectMinCardinality>
    </ObjectIntersectionOf>
</EquivalentClasses>
<EquivalentClasses>
    <Class IRI="#MarriageEvent"/>
    <ObjectIntersectionOf>
        <Class IRI="#MarriageEvent"/>
        <ObjectMaxCardinality cardinality="2">
            <ObjectProperty IRI="#is_event_of"/>
            <Class IRI="#Person"/>
        </ObjectMaxCardinality>
    </ObjectIntersectionOf>
</EquivalentClasses>
<DisjointClasses>
    <Class IRI="#MarriageEvent"/>
    <Class IRI="#Person"/>
</DisjointClasses>
<ClassAssertion>
    <Class IRI="#MarriageEvent"/>
    <NamedIndividual IRI="#Event_Marriage"/>
</ClassAssertion>
<ClassAssertion>
    <Class IRI="#Person"/>
    <NamedIndividual IRI="#Julia"/>
</ClassAssertion>
<ClassAssertion>
    <Class IRI="#Person"/>
    <NamedIndividual IRI="#Max"/>
</ClassAssertion>
<ClassAssertion>
    <Class IRI="#Person"/>
    <NamedIndividual IRI="#Peter"/>
</ClassAssertion>
<DifferentIndividuals>
    <NamedIndividual IRI="#Event_Marriage"/>
    <NamedIndividual IRI="#Julia"/>
    <NamedIndividual IRI="#Max"/>
    <NamedIndividual IRI="#Peter"/>
</DifferentIndividuals>
<ObjectPropertyAssertion>
    <ObjectProperty IRI="#is_event_of"/>
    <NamedIndividual IRI="#Event_Marriage"/>
    <NamedIndividual IRI="#Julia"/>
</ObjectPropertyAssertion>
<ObjectPropertyAssertion>
    <ObjectProperty IRI="#is_event_of"/>
    <NamedIndividual IRI="#Event_Marriage"/>
    <NamedIndividual IRI="#Peter"/>
</ObjectPropertyAssertion>
<SubObjectPropertyOf>
    <ObjectProperty IRI="#is_event_of"/>
    <ObjectProperty abbreviatedIRI="owl:topObjectProperty"/>
</SubObjectPropertyOf>
<IrreflexiveObjectProperty>
    <ObjectProperty IRI="#is_event_of"/>
</IrreflexiveObjectProperty>
<ObjectPropertyDomain>
    <ObjectProperty IRI="#is_event_of"/>
    <Class IRI="#MarriageEvent"/>
</ObjectPropertyDomain>
<ObjectPropertyRange>
    <ObjectProperty IRI="#is_event_of"/>
    <Class IRI="#Person"/>
</ObjectPropertyRange>
</Ontology>

<!-- Generated by the OWL API (version 4.2.8.20170104-2310) https://github.com/owlcs/owlapi -->

Answer 1

OWL等语义Web语言构成了开放世界的假设。该网内缺少特定声明原则上意味着该声明尚未明确提出，无论如何是否真实，无论我们是否真实相信这是真的与否。从本质上讲，从缺席仅凭陈述，演绎推理者不能（也绝不能）推断该陈述是错误的。

https://en.wikipedia.org/wiki/Open-world_assumption

没有关于第二个人存在的陈述并不意味着没有第二个人。

最小基数在Protege

1 个答案: