I see INCLUDE used as a keyword in some Wikidata queries, like in the WHERE clause of https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/queries/examples..., but I can't find any documentation of this syntax extension. Can someone point me to some writeup of this?
Thanks,
Bob
On 22/12/2018 15:59, Bob DuCharme wrote:
I see INCLUDE used as a keyword in some Wikidata queries, like in the WHERE clause of https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/queries/examples..., but I can't find any documentation of this syntax extension. Can someone point me to some writeup of this?
Thanks,
Bob
It's a Blazegraph (and ANZO) extension, called a Named Subquery:
https://wiki.blazegraph.com/wiki/index.php/NamedSubquery
Very useful if the same bit of data is needed in different contexts; can make some queries simpler to read and help the optimiser to do more sensible things.
Best regards,
James.
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