MarkLogic三重对象语言

Question

我处于棘手的状态,我似乎无法在MarkLogic文档中找到有关它的任何信息.我遇到的问题是我使用来自不同来源的三元组,并且他们使用不同的方式来描述字符串对象(有些是多语言的):

<http://subject1> <http://www.w3.org/2004/02/skos/core#prefLabel> "Object"^^xs:string .
<http://subject2> <http://www.w3.org/2004/02/skos/core#prefLabel> "Object"@en .

所以,当我做一个时, cts:triples((), sem:iri("http://www.w3.org/2004/02/skos/core#prefLabel"), "Object") 我只得到第一个三联.

问题是,如何让它忽略语言并返回两个三元组(如果可能,不使用sparql)？

Answer 1

有趣的是,使用上面的"Object"并没有给我带来任何结果(在MacOS上使用MarkLogic 7.0-4.1).相反,我不得不使用:

cts:triples((),(),(
  sem:unknown("Object", sem:iri("http://www.w3.org/2001/XMLSchemastring")),
  rdf:langString("Object", "en")
))

这里有一些较长的代码可以在QConsole中运行(针对空数据库运行它!)以更好地理解发生了什么:

xquery version "1.0-ml";

import module namespace sem = "http://marklogic.com/semantics"
       at "/MarkLogic/semantics.xqy";
sem:rdf-insert(sem:rdf-parse('
@prefix xs:  <http://www.w3.org/2001/XMLSchema> .
<http://subject1> <http://www.w3.org/2004/02/skos/core#prefLabel> "Object"^^xs:string .
<http://subject2> <http://www.w3.org/2004/02/skos/core#prefLabel> "Object"@en .
', "turtle"))
;

'all triples:',
cts:triples((),(),()),

'all objects:',
for $triple in cts:triples((),(),())
return xdmp:describe(sem:triple-object($triple)),

'all object languages:',
for $triple in cts:triples((),(),())
return concat('"', sem:lang(sem:triple-object($triple)), '"'),

'results with "Object":',
cts:triples((),(),sem:iri("Object")),

'results with sem:unknown("Object", sem:iri("xs:string")):',
cts:triples((),(),sem:unknown("Object", sem:iri("xs:string"))),

'results with sem:unknown("Object", sem:iri("http://www.w3.org/2001/XMLSchemastring")):',
cts:triples((),(),sem:unknown("Object", sem:iri("http://www.w3.org/2001/XMLSchemastring"))),

'results with rdf:langString("Object", "en")',
cts:triples((),(),rdf:langString("Object", "en")),

'combined results:',
cts:triples((),(),(
  sem:unknown("Object", sem:iri("http://www.w3.org/2001/XMLSchemastring")),
  rdf:langString("Object", "en")
))

HTH!