Topicmaps.Org is an independent consortium of parties interested in developing the applicability of the Topic Maps Paradigm[1] to the World Wide Web, by leveraging the XML family of specifications as required.

This work includes the development of version 1.0 of an XML grammar for interchanging Web-based Topic Maps, called XML Topic Maps (XTM) Version 1.0, written by the Topicmaps.Org Authoring Group. All versions of the XTM Specification will be permanently licensed to the public.