When you change the Version Number on an existing Data Sheet you will be asked if you want to store a revision of the Data Sheet. A revision is a complete, un-editable copy of the Data Sheet:
- The Data Sheet header is copied and moved into the revision tables. If a note is attached to the Data Sheet, it is copied to a new note attached to the revisioned Data Sheet.
- The Data Sheet Attributes and Variables are copied and moved into the revision tables. Any notes attached to an Attribute or Variable is copied and attached to the revisioned Attribute/Variable.
- For “String – Lookup” type Attributes, the list of allowed lookup values is also copied and stored with the revision.
Because the notes are copied from the Data Sheet, the Attributes and the Variables, a revisioned Data Sheet will reflect the complete record at the time the revision was made.
IPT also controls whether or not Notes are editable. For example, the DS Note is editable on the Maintenance window, but is NOT editable when the same DS is viewed in the Inquiry window. This will be discussed further where the note locking is applied.
The historical versions are viewable in the Data Sheet Inquiry window (as is the current version).