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Home page: commontag.org - never updated after 2009 launch.
- 2009-06-11 PRWeb: Web Companies Develop Common Tag Format
- 2009-06-12 ynniv: Improving Common Tag : Worse is Better
- 2009-06-12 Benjamin Nowack: CommonTag too complicated?
- 2009-09-17 Freebase wiki revision history: CommonTag article created - no revisions (Freebase was one of the organizations behind CommonTag)