Main feature annotation

[enikao]

• Mark feature as main
• Generic "wrap with" / "unwrap" intention
• Helpful for hierarchical structures
• Needs to be standardized
• Can be M3 flag or pre-defined annotation

[slisson]

Sounds like something that belongs into the editor and not into the meta model. Wrap/unwrap actions can be derived from the editor definition which will probably result in a more consistent editor behaviour.

[markusvoelter]

The point is that you don't need to define wrap/unwrap ops. They are automatically possible and available everywhere based on this main feature.

[dslmeinte]

An annotation on a feature would be light-weight enough to have this in the metamodel, IMHO.

[ftomassetti]

I have never seen this mechanism used, so I would tend to think this is not strictly fundamental and therefore handling it with some form of standard annotation could be a good compromise