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GraphStore`

GraphStore`

SPARQLAsk

SPARQLAsk[pattern]

is a query operator that can be applied to an RDFStore, which returns True if pattern matches, and False otherwise.

Details and Options

SPARQLAsk can be used in SPARQLExecute to query a SPARQL endpoint.
The result of executing SPARQLAsk[pattern] is True if there is a subgraph matching pattern, and False otherwise.
In SPARQLAsk[pattern], pattern can take the same form as in SPARQLSelect[pattern].

Examples

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Basic Examples (1)

Data about fruits:

Check whether there is a fruit that is both red and rectangular:

A red and round fruit exists:

Scope (1)

Ask Wikidata whether there is a human (Q5) with German label "Albert Einstein":

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