Networked Knowledge Organization Systems/Services NKOS
From the website:
NKOS is devoted to the discussion of the functional and data model for enabling knowledge organization systems/services (KOS), such as classification systems, thesauri, gazetteers, and ontologies, as networked interactive information services to support the description and retrieval of diverse information resources through the Internet.
Knowledge Organization Systems/Services (KOS) model the underlying semantic structure of a domain. Embodied as Web-based services, they can facilitate resource discovery and retrieval. They act as semantic road maps and make possible a common orientation by indexers and future users (whether human or machine). — Douglas Tudhope, Traugott Koch, New Applications of Knowledge Organization Systems
A wide variety of resources that will interest anyone working with knowledge systems. I would expect any number of these to appear in future posts with comments or observations.