Download The Protégé-OWL editor is bundled with the "full" installation of the Protégé platform. You have two options during the install process: Choosing the "Everything" option during the install process will install the Core Protégé system, the Protégé-Frames editor, the Protégé-OWL editor, and many optional plug-ins. Choosing the "Basic + OWL" option during the install process will install the Core Protégé system, the Protégé-OWL editor, and only those plug-ins which are compatible with OWL. To receive help and the most up-to-date information, please join the protege-owl mailing list. Recommended Optional Components: OWLViz - enables the class hierarchies in an OWL ontology to be viewed and incrementally navigated, allowing comparison of the asserted class hierarchy and the inferred class hierarchy. Please note that this plug-in is now included in the full installation of the Protégé platform. OWL Wizard - helps reduce some of the effort in building models via automation of common modelling tasks and encourages good modelling practices. Please note that this plug-in is now included in the full installation of the Protégé platform. OWLDoc - generates JavaDoc style HTML page documentation for OWL ontologies. Please note that this plug-in is now included in the full installation of the Protégé platform. ... and many other Protege-OWL plug-ins from our collaborators in the CO-ODE project at The University of Manchester. DL Reasoners (e.g., FaCT++, Pellet, Racer) - used to do intelligent reasoning on OWL ontologies. When you start DIG compliant reasoners together with Protégé-OWL, you can use the classify and check consistency buttons. Classification will find the correct position of a class in a hierarchy using the logical definition of the classes. Consistency checking will detect classes that can not have any instances. External Protégé-OWL Plug-ins: nRQL Tab Plug-in - a query interface based on the Racer Query Language. Protégé2Joseki - facilitates export/import from/to Joseki RDF Server. Protégé2Jena - facilitates export/import from/to Jena persistent storage. Other Downloads The source code for the latest version of the Protégé-OWL editor is available in the Protégé Subversion repository. You can browse the source code via the ViewVC application at the following URL: http://smi-protege.stanford.edu/svn/owl/trunk/. You can download the source code (with a Subversion client such as TortoiseSVN) using the following URL: http://smi-protege.stanford.edu/repos/protege/owl/trunk. A detailed explanation of how to check out source code from our repository is available on the main Protégé Web site.