如何查询到特定图形到 RDF 数据库

问题描述

嗨，我有一个 rdf 数据库和一个名为 urn:graph:2d6d3d07-20b0-4050-ada8-43e5655c919a 的图，我想查询此图的以下构造语句，我该怎么做？

# Expand From IRIs 
CONSTRUCT {?iri ?predicate ?object .?object a ?object_type .?object <tag:stardog:studio:label> ?object_label_0 .?object rdfs:label ?object_label_1 .?object <http://purl.org/dc/elements/1.1/title> ?object_label_2 .?subject ?predicate_2 ?iri .?subject a ?subject_type .?subject <tag:stardog:studio:label> ?subject_label_0 .?subject rdfs:label ?subject_label_1 .?subject <http://purl.org/dc/elements/1.1/title> ?subject_label_2 .} 
WHERE {VALUES (?iri) {(<tag:stardog:api:0.13193948493419416>)}
       { ?iri ?predicate ?object .
        OPTIONAL { ?object a ?object_type . }
        OPTIONAL { ?object <tag:stardog:studio:label> ?object_label_0 . }
        OPTIONAL { ?object rdfs:label ?object_label_1 . }
        OPTIONAL { ?object <http://purl.org/dc/elements/1.1/title> ?object_label_2 . }
       } UNION {
        ?subject ?predicate_2 ?iri .
        OPTIONAL { ?subject a ?subject_type . }
        OPTIONAL { ?subject<tag:stardog:studio:label> ?subject_label_0 . }
        OPTIONAL { ?subject rdfs:label ?subject_label_1 . }
        OPTIONAL { ?subject <http://purl.org/dc/elements/1.1/title> ?subject_label_2 . }
       }
      } LIMIT 1000

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