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==Why doesn't SMW use SPARQL as its query language?==
SPARQL is the main query language of the semantic web, and there are a number of big advantages to using SPARQL to query SMW data: it's more flexible overall than SMW's native query language, it would allow for querying semantic data from other sources in addition to the wiki's own data; and using SPARQL would prevent users from having to learn yet another query language.

The use of SPARQL is considered infeasible for querying the data stored directly within the main SMW database tables, though, mostly due to that same flexibility: there are many SPARQL queries that can't be handled by SMW's current querying system.

However, SPARQL querying is easy to do on data that's stored via an RDF triplestore. It is possible to store SMW's data in RDF, and to issue SPARQL queries on that data from the wiki, in various ways — see the question above.

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