Missing value handling for Ordinal variables in Partition

Suggestion:  Please treat missing data (and missing value code data) for ordinal X/Factor variables the same as continuous X/Factor variables when the informative missing option is selected.  That is, test to see if missing is better grouped "high" or "low".  Right now, it appears to be treat the missing value (or missing value code) as an ordinal value and assign it accordingly. 

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