我们正在尝试用linked-data展示推理。
简单的图表在海龟格式中如下所示:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX ex: <http://schema.example.com/>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
ex:Places rdf:type skos:ConceptScheme .
ex:Localities rdf:type skos:Concept .
ex:Localities skos:prefLabel "Localities" .
ex:Localities skos:inScheme ex:Places.
ex:Countries rdf:type skos:Concept .
ex:Countries skos:prefLabel "Countries" .
ex:Countries skos:inScheme ex:Places.
ex:Continents rdf:type skos:Concept .
ex:Continents skos:prefLabel "Continents" .
ex:Continents skos:inScheme ex:Places.
ex:Persons rdf:type skos:Concept .
ex:Persons skos:prefLabel "Persons" .
ex:livesIn a rdf:Property .
ex:isPartOf a rdf:Property .
ex:Localities skos:broader ex:Countries .
ex:Countries skos:broader ex:Continents .
ex:Europe a ex:Continents .
ex:Switzerland a ex:Countries .
ex:Switzerland ex:isPartOf ex:Europe.
ex:France a ex:Countries .
ex:France ex:isPartOf ex:Europe.
ex:Bern a ex:Localities .
ex:Bern skos:prefLabel "Bern".
ex:Bern ex:isPartOf ex:Switzerland.
ex:Thun a ex:Localities .
ex:Thun skos:prefLabel "Thun".
ex:Thun ex:isPartOf ex:Switzerland.
ex:Paris a ex:Localities .
ex:Paris skos:prefLabel "Paris".
ex:Paris ex:isPartOf ex:France.
ex:Hans a ex:Persons.
ex:Hans skos:prefLabel "Hans".
ex:Hans ex:livesIn ex:Bern.
ex:Fritz a ex:Persons.
ex:Frits skos:prefLabel "Fritz".
ex:Fritz ex:livesIn ex:Thun.
ex:Jaques a ex:Persons.
ex:Jaques skos:prefLabel "Jaques".
ex:Jaques ex:livesIn ex:Paris.
想法是在 SPARQL 中执行以下查询:
PREFIX ex: <http://schema.example.com/>
ASK where { ex:Hans ex:livesIn ex:Switzerland }
它应该返回 YES,但它返回 NO。
是否有可能对数据进行建模,这个 ASK-Statement 可以得到 YES 的回答?
就推断而言,它应该是 True,因为 ex:Bern 是 ex:Localities,这是 ex:Countries 的 skos:broader,即 ex:Switzerland。
我还没有找到任何 skos-Modelling and Inference 的好例子。我们希望使用 skos:concepts 而不是 rdfs-subclassing。因为它应该展示在您无法对所有内容进行子类化的情况下对概念的推理。
我在用:
- GraphDB 9.5.0 EE
- OWL2-RL - 规则集