- Get factory from EStructuralFeature types
  - Get default values from meta-model
  - Remove EStructuralFeatureDescriptor
  - Enable automatic construction of a EStructuralFeatureValueProviderBase for all features of a given EClass (instance key = field name)
- Unify creation of editing support
  - Merge Enum support into EStructuralFeatureValueProviderBase
  - Enable management of input selectable from ComboBox also in the multi-instance case
refs 1841