Virtual graph and reasoning

[nata...@gmail.com]

Hi,

 

I have created a virtual graph. Simple queries work, no problem.

 

For example

SELECT * {

   GRAPH <virtual://demo> {

      app:0012b8e0-7a6d-4bcf-b2c3-b5c235afa9d8 a cim:TroubleTicket ;

                        ?p ?o

   }

}

 

But I also have a Stardog DB which has loaded an RDFS model (RDFS reasoning enabled).

 

And I query like this (in console of correct DB)

SELECT ?p ?o

WHERE

{

  { app:0012b8e0-7a6d-4bcf-b2c3-b5c235afa9d8 ?p ?o }

UNION

  { GRAPH <virtual://demo> { app:0012b8e0-7a6d-4bcf-b2c3-b5c235afa9d8 ?p ?o } }

}

 

Then I get expected results with reasoning off and connection pool error with reasoning on.

Error!

com.complexible.stardog.plan.eval.operator.OperatorException: org.apache.tomcat.jdbc.pool.PoolExhaustedException: [StardogServer.WorkerGroup-2] Timeout: Pool empty. Unable to fetch a connection in 30 seconds, none available[size:20; busy:20; idle:0; lastwait:30000].

 

Basically all I want is to resolve supertypes of currently selected type. Which works just fine if I select a subject which is in the triplestore (and not in virtual graph). Like

select * WHERE  {

   app:00022711-0926-43c0-a458-44e32a7bcf9a ?p ?o

}

returning supertypes 

? rdf:type ? cim:EquipmentContainer

? rdf:type ? cim:IdentifiedObject

? rdf:type ? cim:Bay

So, long story short question: are virtual graphs supporting reasoning based on a model in a stardog DB?

Is there a way to achieve this? 

thx, Natan

[Evren Sirin]

Reasoning with virtual graphs is currently not supported but we are
working on that (issue 2690). This feature will be available in one of
the upcoming releases.

Best,
Evren

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[nata...@gmail.com]

Allright. Thanks for the answer!

N