When the developer writes a tranformation himself, he should be able to verify this against two available data model versions (perhaps one from the database and one from the editor / file system).

Submitted by Sander Vermolen on 12 August 2010 at 16:26

Added transformation verification:
Transformations constructed by a developer, are verified against the old and new data model versions. If the constructed transformation does not evolve the old data model into the new data model, the developer is warned and any missing transformation steps are provided as suggestions.