Expressions and "can be parent"

[Martin Jukel]

Hi everybody,

I'm trying to extend mbeddr and I need an element that has 0..n Expressions as children. However, the Expression should only be allowed as children if the result of the expression has a dynamically defined type.

I tried to use a constraint and "can be parent", however even after a lot of research on the Internet I couldn't figure out how to check for the expression result type using the childConcept passed to "can be parent".

The childNode passed to it seems to be always null, so I think I have to use the childConcept somehow.

Any help on that would be greatly appreciated.