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[protege-discussion] Open Source Reasoner?

Taylor Cowan taylor_cowan at
Tue Jul 17 21:10:50 PDT 2007

Both Protege 3 and 4 versions integrate well with Pellet (4 comes with it).  With Protege 3 you'd download Pellet and run it as a DIG server, then in your OWL preferences indicate the host and port (http://localhost:???).

Sorry, can't remember the port, but Pellet reports that on the command line when you start it.

----- Original Message ----
From: Gary Kopp <geez4 at>
To: protege-discussion at
Sent: Tuesday, July 17, 2007 7:56:43 PM
Subject: [protege-discussion] Open Source Reasoner?

A lot of the potential power of Protégé-OWL is realized when it's married to
a DIG reasoner. Protégé is open source (which I greatly appreciate), but the
recommended reasoner is Racer. I seem to remember Racer once being open, but
in its latest incarnation as RacerPro it is commercial. So, to realize the
potential of an open source product I have to buy a commercial product. That
rubs me the wrong way :-) Are there any open source reasoners that might
work with Protégé-OWL?

--Gary Kopp

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