Illustration of how revolution can be put to good use to design ontologies: tree-view program, with export facility to OPML, which then allow transformation into dynamic html.
Covers a large number of known ontologies
The central objective of the CORES project is to encourage the sharing of metadata semantics. CORES will address the need to reach consensus on a data model for declaring semantics of metadata terms in a machine-readable way. Consensus on the ground-rules for declaring standard definitions of terms, as well as local usage and adaptations, will enable the diversity of existing standards to “play together” in an integrated, machine-understandable Semantic Web environment.
List of tags used in metadata schemas – maintained by the CORES Registry
From website: The Living Taxonomy Project is a collaborative effort aimed at creating a global set of open source, standards-based taxonomies for education. The purpose of these taxonomies will be to provide a free cataloging structure for the collection and sharing of education materials around the world. We will be appending new taxonomies on a regular basis and invite our users to add edit these taxonomies as well as suggest or create new ones. (not very active?)