Version number format

The version of a document can be up to 4 characters long, e.g. "A", "1B", "99ZA".

Draft version numbers increment as follows: A, B, C -> Z, ZA, ZB, ZC -> ZZ, ZZA, ZZB, ZZC -> ZZZ, ZZZA -> ZZZZ

Note that we do not go from Z to AZ or to AA. This is because Cognidox versioning maintains sortability of the version strings.

• The maximum issue number is 9999.

• The maximum draft for a document without issues is ZZZZ.

• The maximum draft for a document with issues will depend on the issue number. e.g. something at issue 28 can go to 28ZZ.

See also Part number format and Document type descriptions.