What does (epoch 0 < 2 ) mean?

[Marko Käning]

> Note that while the epoch needs to stay in the portfile, it does not need to increase when the version increases. The calculation for outdated includes the epoch as the first digit, then the version as the 2nd digit and finally the revision as the 3rd digit. So the epoch only needs to increase if the version number decreases. 
Ah, ok, that wasn't so clear to me. Thanks for pointing that out, Frank!