Comprehensive Knowledge Archive Network^Beta

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 applications on top of, or integrate into their websites."

Openness: OPEN

• License: cc-by + GFDL for wikipedia derived part (large).
• Access: ok but no bulk (perhaps via their query engine API but this is probably very inefficient)
  • web: yes. http://www.freebase.com/view/allDomains
  • bulk: yes. http://download.freebase.com/
  • api: yes. http://www.freebase.com/view/freebase/api