Get the
value (between 0 and 1) that indicates the model's quality
as it has been determined in a preceding validation or test run.
A high value indicates a "good" model.
Syntax
Function syntax

>>-DM_getMdlQuality--(--mdl--)---------------------------------><
Parameters
- mdl
- A value of type DM_ClasModel
Return Value
The return Value is of type DOUBLE
- If the property requested is not set, NULL is returned.
- If
the condition above does not apply, the value DOUBLE is returned.