plus a 3 numbered version is very easy to assign to a lib (you know,
like a new param for a function bumps up the middle number, a fix - any
fix - bumps up the rightmost one etc... )
That is what $Revision$ CVS tag does, version number is totally different thing
IMO.
Sorry, but I disagree on this one. You might either think that an
extension "version" defines either its api as accessible by the php
kernel or as accessible by the php coder, but that's exactly what
version numbers are used for.
The cvs tag is for people that compile from source and have to report an
error against a a specific version.
