export of SChoiceType missing

[feldob]

The SChoiceType parameters are not exported, which can lead to failures in mappings. For instance, a type "P" is inherited in a design space by parameter "B.P". The code mapping is bound to "P", not to "B.P"; the rest InPUT takes care of. Now, if SChoiceType is not exported, the "P" mapping is unbound, and so are all parameters "B.P".

[feldob]

Idea for a temporary workaround: keep the original xml file, and use it instead of the assembly of the model entries in the case of an export. This, because the reassembling in the current solution would require some extra work (later stage).