- Conceptual Graphs Home Page - Features introductory material and bibliography, standard notation, events, projects, tools and researchers.
- John Sowa on Knowledge Representation - Provides background material and tutorials on ontology and related topics in logic, conceptual graphs, and natural language semantics.
- Knowledge Interchange Format (KIF) - A DARPA project. KIF is a language designed for use in the interchange of knowledge among disparate computer systems.
- Knowledge Representation Resources - A list of knowledge representation resources, part of the AI Education Repository at the University of Southwestern Louisiana.
- KR, Inc. - Charitable organization concerned with fostering research and communication on knowledge representation and reasoning. Features conferences, educational materials and mailing lists.
- Tockit Project - Aims to create a framework for conceptual knowledge processing in terms of social structures and a common code base. Features software description and contact details.
- WebKB - A set of tools using Conceptual Graphs formalism for building and documentation of knowledge bases, indexing or connecting elements of WWW-accessible documents.
- Ontologies (64)
- Resource Description Framework - RDF@ (89)
- Semantic Web (50)
- Topic Maps (77)
