Versions are identified by unambiguous version numbers. They consist of (positive) integers separated by dots. Both numbers must be between 0 and 32767.

Version numbers come in one of two formats:

1. The main version number includes a position for (more significant) version "jumps" -- before the dot -- and a position for (less significant) version "steps" -- after the dot.

   Examples are 0.1, 3.11, 4.5, 8.1

2. A branch version number is formed by appending a <branch number>.<step number> combination to the main version number of the (root) version from which the branch originates.

   The 'branch number' identifies the specific branch that originates from this root version and the 'step number' the version within this branch. The version number 0.1.2.3, for example, identifies version 3 in branch 2 which originates from the main version 0.1. Thus, in a branch version number, only the 'step number' can be augmented.

For a new version BSCW suggests a version number that has the 'step number' augmented by 1 over the version number of the preceding version. You may enter a higher 'step number' < 32767. A lower 'step number' may be chosen only if you augment the 'jump number', e. g. going from 0.12 to 1.0.