+ A Protege distribution (5.0.0 or higher). The Protege 5.2.0 release is [available](http://protege.stanford.edu/products.php#desktop-protege) from the main Protege website.
+ A Protege distribution (5.0.0 or higher). The Protege 5.5.0 release is [available](http://protege.stanford.edu/products.php#desktop-protege) from the main Protege website.