Revision . Stable . Testing . Development
+If one number is raised, all to the left get a reset to zero.
Trailing zeros can be omited - 0.5 is the same as 0.5.0.0
-Testing number is raised if a new feature o
f importance has to attract
+Testing number is raised if a new feature o has to attract
the attention of the testers.
Testing releases come with all known bugs disabled (if possible).