[Boost-users] Boost license / OSI approved

Hi there, I noticed that the Boost license is not listed as an OSI approved license (see here: http://www.opensource.org/licenses/alphabetical ). Why is this ? The license seems to nicely comply with the Open Source definition, from what I can see (see http://www.opensource.org/docs/osd). http://www.fsf.org/licensing/licenses/ lists it as GPL-compatible. Best Regards, Ruediger