Re: [namedgraphs] Problem with ASK queries

[Kai K. <ku...@on...>]

  Hello Jaap,

Thank you. That helps. But that means I have to put the FROM NAMED 
graphs manually from the query to the NamedGraphDataset, right? And what 
about FROM statements? I can only specify one default graph via API but 
I can write many FROM statements.

Best,
Kai

Am 29.09.2010 12:48, schrieb Blom, J.J.C. (Jaap):
> Hello Kai,
>
> Recently I dived into this situation and if I recalled correctly this is correct. NG4J per default disregards the default graph in the query. I can only assume this is because of the assumption that because you send it to a dataset the graphs that are needed are already there.
>
> The good news is that it is possible to instruct NG4J to treat one graph as the default graph. You can do that by using the de.fuberlin.wiwiss.ng4j.sparql.NamedGraphDataset.NamedGraphDataset(NamedGraphSet, Node) constructor.
>
>
> With kind regards,
>    Jaap Blom
>
>
> -----Original Message-----
> From: Kai Kühn [mailto:ku...@on...]
> Sent: woensdag 29 september 2010 11:19
> To: ng4...@li...
> Subject: [namedgraphs] Problem with ASK queries
>
>    hi all,
>
> I have a problem with SPARQL/ASK queries. I insert a triple (s,p,o) into graph A. Then I do the following query :
>
> ASK FROM<B>  WHERE { s p o. }
>
> It returns true although the triple is in graph A not B. Same hold for:
>
> ASK FROM NAMED<B>  WHERE { s p o. }
>
> Can anyone reproduce this? Is it a bug?
>
> Best,
> Kai
>
> --
> Kai Kühn
> Halo Team
> ontoprise GmbH - know how to use Know-how
> - - -
> Halo Extension - Want to get involved? http://smwforum.ontoprise.com/development
> - - -
> An der RaumFabrik 29; 76227 Karlsruhe; Germany
> Tel.: +49 721 509809-48; Fax: +49 721 509809-11
> email: ku...@on..., www: http://www.ontoprise.com Registered Office: Karlsruhe, Germany, HRB 109540 Managing Directors: Prof. Dr. Jürgen Angele, Hans-Peter Schnurr
> - - -
>
>
>
> ------------------------------------------------------------------------------
> Start uncovering the many advantages of virtual appliances
> and start using them to simplify application deployment and
> accelerate your shift to cloud computing.
> http://p.sf.net/sfu/novell-sfdev2dev
> _______________________________________________
> ng4j-namedgraphs mailing list
> ng4...@li...
> https://lists.sourceforge.net/lists/listinfo/ng4j-namedgraphs
>
> http://www.croon.nl/disclaimer
> http://www.croon.nl/inkoopvoorwaarden
> Kamer van Koophandel Rotterdam nr. / Chamber of Commerce Rotterdam no.: 24002312


-- 
Kai Kühn
Halo Team
ontoprise GmbH – know how to use Know-how
- - -
Halo Extension - Want to get involved? http://smwforum.ontoprise.com/development
- - -
An der RaumFabrik 29; 76227 Karlsruhe; Germany
Tel.: +49 721 509809-48; Fax: +49 721 509809-11
email: ku...@on..., www: http://www.ontoprise.com
Registered Office: Karlsruhe, Germany, HRB 109540
Managing Directors: Prof. Dr. Jürgen Angele, Hans-Peter Schnurr
- - -