Sesame ClassCastException?

[Asa Calow]

Hi all,

Having added some data, I'm getting the following error from Stardog: 

java.lang.ClassCastException: org.openrdf.model.impl.CalendarLiteralImpl cannot be cast to org.openrdf.model.Resource.

The controversial triple (which leads to the error) is this:

<http://pmdtest.dev/graph/slug/sluggy/metadata> <http://purl.org/dc/terms/modified> "2014-01-30T15:39:15Z"^^<http://www.w3.org/2001/XMLSchema#dateTime> .

 Slightly more odd is that this query is fine:

CONSTRUCT {<http://pmdtest.dev/graph/slug/sluggy/metadata> ?p ?o} WHERE {<http://pmdtest.dev/graph/slug/sluggy/metadata> ?p ?o}

Whereas this query fails:

DESCRIBE <http://pmdtest.dev/graph/slug/sluggy/metadata>

After some poking around it looks like this is a Sesame issue, but if anyone could shed some light on the matter it would be massively appreciated.

Thanks,

Asa 

[Evren Sirin]

It is hard to tell what is going on without additional information. If
you could provide a minimal dataset to reproduce the problem that
would be great. With just one triple you mention, the describe query
seems to work fine. Also were you trying the query with a reasoning
level? Which version of Stardog?

Best,
Evren

> --
> -- --
> You received this message because you are subscribed to the C&P "Stardog"
> group.
> To post to this group, send email to sta...@clarkparsia.com
> To unsubscribe from this group, send email to
> stardog+u...@clarkparsia.com
> For more options, visit this group at
> http://groups.google.com/a/clarkparsia.com/group/stardog?hl=en

[Laurent Pierre]

Hi, 

I have a problem with a rule that doesn’t fire since in may opinion it should (in file RuleSimplified2.ttl line 57).

I test the context with a sparql query :

PREFIX : <http://www.edf.fr/score/score#>

PREFIX meteo: <http://www.meteo.org#>

SELECT  ?hs ?mp ?ec ?tu ?com ?s ?a ?v ?ec

WHERE {

    ?c :clientId "lambert"^^xsd:string .

    ?t :hasYear 2010 .

    ?c :livesIn ?h .

    ?h :hasSituation ?hs .

    ?hs :takesPlaceIn ?t .

    ?hs :hasContractMaxPower ?mp .

    ?hs :hasElectricityConsumption ?ec .

    ?hs :hasTimeOfUse ?tu .

    ?h :isLocatedIn ?com .

    ?com meteo:hasStation ?s .

    ?s meteo:hasAverageDegreesByDay ?a .

    ?a meteo:onYear 2010 .

    ?a meteo:val ?v .

    ?hs :hasStandardElectricityConsumption ?ec .

}

which works fine until I add the red condition. This condition is what should be computed in the rule line 57 and seems not to be ‘present'.

I join the ontologies, the rule file, the sparql file and a script to construct the database.

Have you any clue of what’s happening here ?

Thanks.

Laurent 

[Héctor Pérez-Urbina]

Thank you for your email. I'll take a look at this tomorrow.

--
-- --
You received this message because you are subscribed to the C&P "Stardog" group.
To post to this group, send email to sta...@clarkparsia.com
To unsubscribe from this group, send email to
stardog+u...@clarkparsia.com
For more options, visit this group at
http://groups.google.com/a/clarkparsia.com/group/stardog?hl=en

--
Best,
Héctor

[Héctor Pérez-Urbina]

Laurent,

Playing with your query I found out that

<http://www.edf.fr/score/test0#laMaisonDeLambertS1> <http://www.edf.fr/score/score#hasElectricityConsumption> "5000.0"^^<http://www.w3.org/2001/XMLSchema#float>

and

<http://www.edf.fr/score/test0#laMaisonDeLambertS1> <http://www.edf.fr/score/score#
   hasStandardElectricityConsumption> "4940.85"^^<http://www.w3.org/2001/XMLSchema#float>

According to your query, the electricity consumption and the standard electricity consumption should be the same; therefore we get no results. Did you mean to use another variable for the standard one? Should these two be the same?

--
Best,
Héctor

[Laurent Pierre]

Dear Hector,

Thank you, I made a mistake when writing the query.  So I went further with my queries and I found another problem with this one :

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

PREFIX owl: <http://www.w3.org/2002/07/owl#>

PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

PREFIX : <http://www.edf.fr/score/score#>

SELECT  ?tprev ?previousYearCons  ?t ?currentYearCons

WHERE {

    ?c :clientId "lambert"^^xsd:string .

    ?t :hasYear 2010 .

    ?c :livesIn ?h .

    ?h :hasSituation ?hs .

    ?hs :takesPlaceIn ?t .

    ?h :hasSituation ?hsprev .

    ?hsprev :takesPlaceIn ?tprev .

    ?tprev :precedes ?t .

    ?hs :hasStandardElectricityConsumption ?currentYearCons .

    ?hsprev :hasStandardElectricityConsumption ?previousYearCons .

}

I get no answer, but when I withdraw either one of the 2 last clause (written in bold), I get the correct answer for  ?previousYearCons or 

?currentYearCons.

It’s a bit strange isn’t it ?

Best 

Laurent

To unsubscribe from this group and stop receiving emails from it, send an email to stardog+u...@clarkparsia.com.

[Héctor Pérez-Urbina]

Yes. This looks quite strange. I'll take a closer look today and let you know what I find.