From: How orthogonal are the OBO Foundry ontologies?
September 2009
March 2010
September 2010
Total terms
272,168
311,351
318,872
Reused terms
10,972 (4.0%)
13,458 (4.3%)
17,067 (5.4%)
Overlap terms
9,598 (3.5%)
9,566 (3.1%)
9,992 (3.1%)