Construct Queries in SPARQL
So far, we have seen that the answers to questions in SPARQL can take the form of a table, or of a single bit (true/false for Yes/No questions). But in the RDF world, answers to queries can take a more flexible form—an answer could take the form of an RDF graph. This is the idea behind CONSTRUCT—we use the expressive power of RDF in the answer to a query, as well as in the question.
Suppose we wanted to find out all the movie directors in our dataset about movies. One way to find this out would be to write a query that finds out all the people that movies were directed by:
?director
:EliaKazan
:FredGuiol
:GeorgeCukor ...
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