This is a review of Protege and Protege-OWL.
The article is more or less fine. Some small points are listed below:
I think the claim that Protege has become the default open-source editor is a bit strong. Perhaps you should change this to “it’s a widely used open source editor”.
At this time, Protege 4 does actually have some simple editing support for SWRL rules, and as far as I know, in contrast to Protege 3, it provides proper DL Safe Rule reasoning support via Pellet.
You might also want to include a link to the OWL API at
You can link to the OWL Syntaxes article at: