Major
Nice to have
Bugfix
Major
Enhancement
(User-visible)
Currently it is possible to classify by wrapper-valued attributes, but it is not possible to further classify by the attributes of the target type.
When selecting a wrapper (single) valued attribute, it should be possible to select its attributes for the classification. If such an attribute is selected again, it should be possible to follow the path accordingly, and so on.
Test
No test.