SMG: please estimate and address the topic accordingly

The datatype of auto-generated class fields with Datatype Structure is ExtensionObject. The data type of auto-generated class fields with a sub-type of structure is the model defined datatype.

Sub-typing a variable means the auto-generated class subtype overrides the field declaration with the specific datatype in the subtype. This works nicely if the supertype declares a model defined datatype. It does not work if the supertype defines a field of type ExtensionObject because ExtensionObject is not a base class of the model defined datatype.

Coding a work around would mean classes would look difference depending on whether the original supertype was 'structure' or a 'user defined' data type.

i.e. if the original is a structure there would be no overridden field with the model defined datatype.

The specification clearly says that a structure type can be sub typeded to a specific structure. I understand that it may require additional coding, but not fixable is not an anwser.

issue will be addressed in 335