Re: [Distutils] accept the wheel PEPs 425, 426, 427

I recall I defined it there : http://www.python.org/dev/peps/pep-0345/#environment-markers

Yes, that is the best place. PEP 345's supposed successor http://www.python.org/dev/peps/pep-0426/ adds ( and ) to the environment markers language, and adds the "extra" variable.