在Python中使用RDFlib从RDF文件中提取标签和注释

Question

我有以下本体：

<!-- http://purl.org/ontology/bibo/Article -->
<owl:Class rdf:about="Article">
    <rdfs:label xml:lang="en">Article</rdfs:label>
    <rdfs:subClassOf rdf:resource="Document"/>
    <rdfs:isDefinedBy rdf:datatype="&xsd;anyURI"
        >http://purl.org/ontology/bibo/</rdfs:isDefinedBy>
    <ns:term_status>stable</ns:term_status>
    <rdfs:comment xml:lang="en"
        >A written composition in prose, usually nonfiction, on a specific topic, forming an independent part of a book or other publication, as a newspaper or magazine.</rdfs:comment>
</owl:Class>

<!-- http://purl.org/ontology/bibo/AudioDocument -->

<owl:Class rdf:about="AudioDocument">
    <rdfs:label xml:lang="en">audio document</rdfs:label>
    <rdfs:subClassOf rdf:resource="Document"/>
    <rdfs:isDefinedBy rdf:datatype="&xsd;anyURI"
        >http://purl.org/ontology/bibo/</rdfs:isDefinedBy>
    <ns:term_status>stable</ns:term_status>
    <rdfs:comment xml:lang="en"
        >An audio document; aka record.</rdfs:comment>
</owl:Class>

<!-- http://purl.org/NET/c4dm/event.owl#place -->

<owl:ObjectProperty rdf:about="&event;place">
    <skos:scopeNote xml:lang="en"
        >Used to relate an event such as a conference to the geographical place where it happens, for example Paris.</skos:scopeNote>
</owl:ObjectProperty>

<!-- http://purl.org/dc/terms/date -->

<owl:DatatypeProperty rdf:about="&terms;date">
    <skos:scopeNote xml:lang="en"
        >Use to link a bibliographic item to the date of an event. Check dcterms:created and other for proper specializations for this property</skos:scopeNote>
</owl:DatatypeProperty>

我试图从类、属性定义中提取标签、注释和about。我用RDFlib来解析文件。我想要输出：

^{pr2}$

我的初始代码：

for s, p, o in graph:
    if type(s) == rdflib.term.URIRef:
            print 'Subject = ',s 
            print ' '
            print 'Property = ',p 
            print ' '
            print 'Object = ',o 
            print ' '

我真的不知道怎么继续！有人能帮我吗？在

Answer 1

可以使用sparql解决这个问题。相同的问题在Why my query doesn't work using RDFlib中得到了回答，这是同一个问题。在

代码可以是这样的：

PREFIX ns: <http://oaei.ontologymatching.org/2011/benchmarks/101/onto.rdf#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>

SELECT DISTINCT ?varClass ?varSubClass ?varSubClassComment ?varProperty ?varPropComment
FROM <http://oaei.ontologymatching.org/2011/benchmarks/101/onto.rdf>
WHERE {
  VALUES ?propertyType { owl:ObjectProperty owl:DatatypeProperty }

  ?varClass rdf:type owl:Class .
  ?varProperty rdf:type ?propertyType ;
               rdfs:domain ?varClass .
  OPTIONAL{ ?varProperty rdfs:comment ?varPropComment }
  OPTIONAL{ ?varSubClass rdfs:subClassOf ?varClass ;
                         rdfs:comment ?varSubClassComment }
}

总之，自从我发布了这个答案之后，我研究了一些RDFlib代码和sparql。后者可能适用于大多数情况。在