Re: SPARQL vs OWL query languages

Cristina Sarasua wrote:
> 
> Dear all,
> 
> First of all I would like to thank you for maintaining this list.
> 
> I have a question regarding the necessity of using OWL query languages 
> when dealing with OWL DL ontologies.
> 
> SPARQL is a query language for RDF and it has been stated that OWL query 
> languages are needed so that queries take into account the semantics of 
> OWL. However, OWL semantics could be materialized by means of a 
> reasoner. So, couldn't we achieve the same with SPARQL in a Jena 
> environment for example?

Yes - you can but not for all of OWL-DL.  For full OWL-DL, you use an external 
reasoner (and that can be done and use the Jena API).

Jena inference documentation:
http://jena.sourceforge.net/inference/index.html

Support for Jena is on the mailing list : jena-dev@groups.yahoo.com

	Andy

>  
> If I am wrong I would be extremely grateful if somebody could explain 
> this problem in depth using examples if possible.
> 
> Thank you in advance.
> 
> 
> --
> 
> Cristina Sarasua Garmendia
> Área de Turismo, Patrimonio y Creatividad
> Tourism, Heritage and Creativity Department