The Protégé-Frames editor provides a full-fledged user interface and knowledge server to support users in constructing and storing frame-based domain ontologies, customizing data entry forms, and entering instance data. Protégé-Frames implements a knowledge model which is compatible with the Open Knowledge Base Connectivity protocol (OKBC). In this model, an ontology consists of a set of classes organized in a subsumption hierarchy to represent a domain’s salient concepts, a set of slots associated to classes to describe their properties and relationships, and a set of instances of those classes - individual exemplars of the concepts that hold specific values for their properties.

Features of Protégé-Frames include:

• A wide set of user interface elements that can be customized to enable users to model knowledge and enter data in domain-friendly forms.
• A plug-in architecture that can be extended with custom-designed elements, such as graphical components (e.g., graphs and tables), media (e.g., sound, images, and video), various storage formats (e.g., RDF, XML, HTML, and database back-ends), and additional support tools (e.g., for ontology management, ontology visualization, inference and reasoning, etc.).
• A Java-based Application Programming Interface (API) that makes it possible for plug-ins and other applications to access, use, and display ontologies created with Protégé-Frames.

Further documentation about Protégé-Frames can be found in the documentation section of our Web site, including the popular Ontology Development 101 guide to building a frame-based ontology, the Protégé-Frames User's Guide, and the Protégé-Frames FAQ.


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View applet demos of Protégé-Frames.

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Browse examples of ontologies built with Protégé-Frames.