Comments (2)
I think we have introduced this to have the possibility to represent subclassing for data types. We currently might not have data types in CityGML 3.0 that are derived from other data types, but this could happen in ADEs.
from 3dcitydb.
Ok, in this case the foreign key constraint on supertype_id
is incorrect:
CONSTRAINT datatype_supertype_fk FOREIGN KEY (supertype_id)
REFERENCES citydb.objectclass (id) MATCH SIMPLE
ON UPDATE CASCADE
ON DELETE NO ACTION
The foreign key is currently defined to reference objectclass
but shall rather reference datatype
itself.
from 3dcitydb.
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