As far as documents are concerned, no data records for effectivity periods are created dependently of the change number. The change number is maintained in the basic data in the document info record.

You can only process a document with reference to one change number. Once you save the change number in the document info record, you cannot change it.

However, you can reserve a document for one or more change numbers. To do this, you must enter an object management record for the document in the change master. At this point, you have not yet entered a change number in the document info record.

When you change the document later on, you see a dialog box that lists all the change numbers for which the document has been reserved by means of an object management record.

There are revision levels for documents.