Convention: STD-SEQUENCE

Default version: determined by EXAMPLE of MODIFY-TYPE-ATTRIBUTES

Format: [<prefix>]<digit group>

The prefix is a string of any permissible characters ending with a digit. The prefix is the same for all the versions of a type.

Incrementation procedure

The concluding digit group of a version designation is incremented by 1 (if this is not possible, an error message is output).

Standard base selection

The highest existing version is used as the base version.

Checks

The target version must be at the same level or higher than the highest existing version.