Query Forms

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SPARQL has four query forms. These query forms use the solutions from pattern matching to form result sets or RDF graphs. The query forms are:

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\n SELECT\n

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Returns all, or a subset of, the variables bound in a query pattern match.

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\n CONSTRUCT\n

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Returns an RDF graph constructed by substituting variables in a set of triple templates.

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\n ASK\n

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Returns a boolean indicating whether a query pattern matches or not.

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\n DESCRIBE\n

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Returns an RDF graph that describes the resources found.

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Formats such as SPARQL 1.1 Query Results JSON Format, SPARQL Query Results XML Format or SPARQL 1.1 Query Results CSV and TSV Formats can be used to serialize the result set from a SELECT query or the boolean result of an ASK query.