Retrieve triples with properties restricted by namespace [duplicate]

问题

This question already has an answer here:

SPARQL - Restricting Result Resource to Certain Namespace(s) (1 answer)

Closed 6 years ago.

Given a resource http://foo.com/res1 that is the subject of several of triples with properties from two different ontologies:

<http://foo.com/res1> dc:author <http://ppl.com/bob>
<http://foo.com/res1> dc:title "some resource"
<http://foo.com/res1> foaf:depiction <http://flickr.com/picture/1234>

I want to obtain all the triples with properties in the dc namespace and ignore all others. How can I do this?

回答1:

How about using the XPath starts-with function:

SELECT * 
WHERE {
    <http://foo.com/res1> ?p ?o .
    FILTER(fn:starts-with(STR(?p),"http://purl.org/dc/elements/1.1/")).
}

It fetches all triples for <http://foo.com/res1>, but includes only the ones that have a predicate whose string representation starts with http://purl.org/dc/elements/1.1/.

来源：https://stackoverflow.com/questions/18831007/retrieve-triples-with-properties-restricted-by-namespace