If a linked revision is selected, its sequence number is displayed in this field and can not be changed. In the mode "Add new revision detail" the sequence number of the next revision to be added is auto-suggested by the system.
Since the revision number allows an alpha-numeric value, the sequence number dictates the sequential order of revisions and these must start at #1 and follow on one another without gaps. The function will also ensure that the effective date of a revision may not be earlier than that of revisions with lesser sequence numbers or later than that of revisions with greater sequence numbers. Where 1 or more revisions have the same effective date, the record with the greatest sequence # is regarded as the currently active one.