I think this is a nice way to clarify the different use cases for version numbers:

- SemVer is a communication tool for when an author needs to tell a potential user what to expect from a new version.

- TrunkVer is an auditing/engineering tool for when you need to give a unique identifier to a version for technical reasons.

I think this page is a nice codification of a useful practice, but it does itself a disservice by positioning itself against SemVar and claiming to be a "drop-in" replacement.