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The Protégé Ontology Editor and Knowledge Acquisition System
Protégé is a free , open source ontology editor and knowledge-base framework. The Protégé platform supports two main ways of modeling ontologies via the Protégé-Frames and Protégé-OWL editors.Mind Mapping & Diagrams
Graph theory - Wikipedia, the free encyclopedia
In mathematics and computer science , graph theory is the study of graphs , mathematical structures used to model pairwise relations between objects from a certain collection. A "graph" in this context is a collection of " vertices " or "nodes" and a collection of edges that connect pairs of vertices. A graph may be undirected , meaning that there is no distinction between the two vertices associated with each edge, or its edges may be directed from one vertex to another; see graph (mathematics) for more detailed definitions and for other variations in the types of graph that are commonly considered.
Pellet Features
Pellet supports reasoning with the full expressivity of OWL -DL ( SHOIN(D) in Description Logic jargon) and has been extended to support the forthcoming OWL 2 specification ( SROIQ(D) ), which adds the following language constructs: Ensures that an ontology does not contain any contradictory facts.[Omnigator] Welcome Page
The Omnigator is a technology showcase and teaching aid designed to demonstrate the power of Topic Maps .