How to depend on a variant (or do I want subports)?

[Ryan Schmidt]

On Oct 31, 2012, at 16:02, Daniel J. Luke wrote:

> On Oct 31, 2012, at 4:44 PM, MK-MacPorts at techno.ms wrote:
>> If once introduced you'd have to increase version number AND epoch every time.
> 
> nope, you just have to keep it there.

When I was first learning about MacPorts years ago, I also had the incorrect impression that the epoch must be increased every time. I wonder where we both got that idea. Do we have some documentation about epoch that doesn't explain it clearly?