Some top-level ontologies

Here we list some kind-of hierarchies of first order types. We do not address ontologies which are theories such as the ontologies of KSL (Stanford). Concept type top-level ontologies Relation type top-level ontologies Ontology: A Resource Page IKARUS: a WWW accessible knowledge management system (some ontologies are provided) A WWW accessible prototype for WordNet 1.6, the multi-language WordNet (Netscape 2.0 required)