Microsoft's shared source licenses

John Cowan cowan at
Sat Apr 29 14:42:45 UTC 2006

Zac Bowling scripsit:

> So what do you guys think of the new Microsoft shared source licences?
> The FSF of Europe said that 2 licenses (MS-PL and MS-CL) are both
> free/open source compatible licenses.

Because Microsoft hasn't submitted these licenses for OSI approval,
neither this list nor the OSI has taken a position on them.  Personally,
I agree with FSF Europe.

[Rotor license:]

This license is not Open Source, but I think Microsoft would have a
very difficult time using it as a poison pill.  Still, it can't hurt
to be safe.

> look at IronPython's license: 

This license looks Open Source to me (IANAL, this is not legal advice,
I don't speak for the OSI).

> Very similar. I see this one most in a lot of Microsoft applications. A
> few terms in there scare me. 

Which ones?

Time alone is real                      John Cowan <cowan at>
  the rest imaginary
like a quaternion       --phma

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