RE: Executing OWL-S/Profile

Salut Daniela,

Luke already gives you  the answer about an engine to execute an OWL-S... 
It's the api OWL-S provided by Mindswap.
It allows you to "execute" your OWL-S by using the datas located in the 
grounding.
If needed depending on how is your OWL-S is concerned,  you can add a XSL 
Tranformation into a CDATA tag. 

You can watch their wonderful demo named : "Web Service Composer" to get 
some examples showing you 
how to execute an OWL-S.

Concerning the inference engine, I think that Pellet or Racer are very 
interested to use in a OWL/OWL-S context.

Cordialement,

Hervé