The IDEF5 Visio stencil provides the shapes for the Integrated Definition for Ontology Description Capture Method (IDEF5) modeling notation. The IDEF5 Visio template provides a starting point for building IDEF5 models, including a simple example of how IDEF5 can be used to build ontologies.
Learn more about IDEF5 at http://www.idef.com/idef5-ontology-description-capture-method/.