Protege

Protege is the latest tool in an established line of tools developed at Stanford University for knowledge acquisition. Protege has thousands of users all over the world who use the system for projects ranging from modeling cancer-protocol guidelines to modeling nuclearpower stations. Protege is freely available for download under the Mozilla open-source license. One of the major advantages of the Protege architecture is that the system is constructed in an open, modular fashion. Its component-based architecture enables system builders to add new functionality by creating appropriate plug-in. The Protege Plug-in Library 3 contains contributions from developers all over the world.