-
Freebase
Description "Freebase is an open database of the world?s information. It is built by the community and for the community?free for anyone to query, contribute to, built... -
UMBEL (Upper Mapping and Binding Exchange Layer)
A lightweight, reference structure of 28,000 subject concepts for the Web. UMBEL is jointly developed and maintained by Structured Dynamics LLC and Ontotext AD. There is a total...