TODO:
rename all subconcepts to ...Case
Note that also Indian case markers were included here (ILPOSTS). These are described differently, either as postpositions or as grammatical cases.
Skipped EAGLES case feature values Uninflected (uninformative), and
NonGenitive (= complement of Genitive).
As for TDS case feature values, only "grammaticalCase" has been adopted.
As for GOLD case feature values, everything has been adopted, although it seems
that some of these cases are actually semantic (theta) roles, i.e., "case" in the
sense of Fillmore (1966), e.g., BenefactiveCase.