General rule: all subfields of QE Objects should be Objects (e.g. use ASListStructure.List, and not LIST OF Object); this will facilitate offlining and onlining of these subfields.

Basic task for software: determine the different types of Objects to be manipulated; basically, each one is automatically offlined when created (but also left online).

In general, the software is able to guarantee that it only works with objects from the database for one qe problem at a time.