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[protege-owl] Re : Re : Possible bug in SWRL for 3.4 beta b506

Joseph Awalebo jawalebo at
Wed Oct 29 07:12:47 PDT 2008

Hi Csongor,
Thanks for help.
The problem was the fact that I did not install jess.jar in the right 
directory which is ./plugins/edu.stanford.smi.protegex.owl/. I find that when 
reading at

I will try running some examples.

Thanks for your time. 


De : Csongor Nyulas <csongor.nyulas at>
À : User support for the Protege-OWL editor <protege-owl at>
Envoyé le : Mardi, 28 Octobre 2008, 21h04mn 35s
Objet : Re: [protege-owl] Re : Possible bug in SWRL for 3.4 beta b506

I think the picture was cut out from my previous message. Here it is:

Csongor Nyulas wrote: 
Hi Joseph,

Once you clicked on the "Activate/deactivate SWRLJessTab" button marked 
with 'J' in the top right corner of the SWRLTab, the SWRLJessTab will 
appear in the bottom part of the plugin, and the first button is the 
"OWL +SWRL-> Jess" button that you are looking for.

Or, in visual terms:

Enjoy SWRL!

Joseph Awalebo wrote:
Can you tell me where is located the " OWL +SWRL-> Jess " button?
I have the same version of Protege and also have Jess engine installed.


*De :* Martin O'Connor <martin.oconnor at>
*À :* protege-owl at
*Envoyé le :* Mardi, 28 Octobre 2008, 10h18mn 59s
*Objet :* Re: [protege-owl] Possible bug in SWRL for 3.4 beta b506

rdfs:label is an RDF entity not an OWL entity so is not supported by 
SWRL. I plan to have a RDF built-in library soon to support the use of 
RDF entities queries.


Quoting Matsokis Aristeidis <aristeidis.matsokis at 
<mailto:aristeidis.matsokis at>>:

Dear all,

I have the SWRL rule:

Corrective_Maintenance(?x)  ?  rdfs:label(?x, ?y)  ?   
swrlb:contains(?y, "a") ? sqwrl:select(?x)
After upgrading to 3.4 Beta Build 506 on SWRL Jess tab when I press 
the " OWL +SWRL-> Jess " button to translate the asserted facts to 
OWL knowledge I get the following message:

Exception importing SWRL rules and OWL knowledge: 


empty property name in SWRLDatavaluedPropertyAtom 'rdfs:label(?x, ?y)'

Thus, I can no longer translate the knowledge to OWL. The programme 
was working well in build 126.

Thank you very much in advance for your time.

Best Regards,

Aristeidis Matsokis

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