GraphStore`
GraphStore`

SPARQLPropertyPath

SPARQLPropertyPath[start, {p1,p2,…}, end]

is a pattern object that represents a path in a RDF graph that starts at subject start, visits edges with predicates pi and ends at object end.

更多信息和选项

  • Each pi can be a predicate URL or a pattern.
  • The arguments start and end can be a URL or a SPARQLVariable and end can also be a literal like a number or string.
  • SPARQLPropertyPath[start,{p1,p2,…},end] matches a path {RDFTriple[a,f1,b],RDFTriple[b,f2,c],…,RDFTriple[y,f2,z]} if MatchQ[{f1,f2,…},{p1,p2,…}] returns True and start is either a SPARQLVariable or a and end is either a SPARQLVariable or z.
  • The pi can be any combination of the following forms:
  • URL[…]a predicate path
    SPARQLInverseProperty[…]an inverse path
    Sequence[…]a sequence path
    Alternatives[…] (|)an alternative path
    RepeatedNull[…] (...)a zero or more path
    Repeated[…] (..)a one or more path
    Repeated[…,{0,1}]a zero or one path
    Except[…]a negated property set (only for predicates, inverse predicates and alternatives thereof)

范例

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基本范例  (1)

Specify family relations:

Find the grandparents of Scarlett:

The same query using triple patterns and UNIONs:

Scope  (1)

Specify relationships between people and how the used properties are related:

Find all friends and good friends of Bob:

Wolfram Research (2019)，SPARQLPropertyPath，Wolfram 语言函数，https://reference.wolfram.com/language/GraphStore/ref/SPARQLPropertyPath.html.

文本

Wolfram Research (2019)，SPARQLPropertyPath，Wolfram 语言函数，https://reference.wolfram.com/language/GraphStore/ref/SPARQLPropertyPath.html.

CMS

Wolfram 语言. 2019. "SPARQLPropertyPath." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/GraphStore/ref/SPARQLPropertyPath.html.

APA

Wolfram 语言. (2019). SPARQLPropertyPath. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/GraphStore/ref/SPARQLPropertyPath.html 年

BibTeX

@misc{reference.wolfram_2024_sparqlpropertypath, author="Wolfram Research", title="{SPARQLPropertyPath}", year="2019", howpublished="\url{https://reference.wolfram.com/language/GraphStore/ref/SPARQLPropertyPath.html}", note=[Accessed: 22-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_sparqlpropertypath, organization={Wolfram Research}, title={SPARQLPropertyPath}, year={2019}, url={https://reference.wolfram.com/language/GraphStore/ref/SPARQLPropertyPath.html}, note=[Accessed: 22-November-2024 ]}