Consolidate the exploration MMs.
Current Status.
The current Meta-Model of the exploration plugins contain a lot of deprecated EClasses and several modeling constructs which were introduced for compatibility reason, e.g., the definition of a “marker interface” for expression terms.
Proposed Change.
In order to simplify the model and to reduce the amount of confusing, deprecated model elements, remove the outdated parts as the migration timeframe is over now. Also remove the compatibility workarounds and create Migrators for them.
(from redmine: issue id 3190, created on 2017-11-24, closed on 2019-03-25)