Default Reasoning Level in Stardog

[Jon Tutcher]

Hi Everyone,

I was wondering if there's a way of configuring a Stardog repository to have reasoning enabled by default (such that queries are always answered using inference). My problem comes as I'd like to use the Stardog DB as a resource in a federated query (on another server), and want inferred triples returned. 

I know that I can add HTTP headers (or any of the other APIs) to turn reasoning on if I'm talking to Stardog directly , but as far as I know, the SPARQL federated query standard doesn't support these, so if I have a query on another (non-Stardog) server such as:

PREFIX foaf:   <http://xmlns.com/foaf/0.1/>
SELECT ?s ?o
{
  ?s a foaf:Person
  SERVICE <http://MyStardogServer.com/myDB> {?s foaf:knows ?o }
}

I can't (at the moment) get Stardog to answer the federated part of this with any inferred triples. 

The other option is to write a proxy script to add an HTTP header into the request the federated query server sends, which would be doable - just wondered if there was a cleaner solution!

Many thanks!

Jon Tutcher

[Evren Sirin]

You can specify the reasoning level in the connection string directly.
Did you try using:

SERVICE <http://MyStardogServer.com/myDB;reasoning=SL>

Best,
Evren

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