UMLR — Parameters of a ParameterSet should be ordered

Referring to ParameterSet, section 9.9.16.4 "Association Ends" on page 190 of the PDF file:
Since parameters of a ParameterSet specify "alternative sets of inputs or outputs that a Behavior may use", and the Parameters of a Behavior are specified with the "ordered" constraint, by similar reasoning it seems that the parameters of a ParameterSet should also be ordered.

Consider a Behavior which has two alternate sets of input parameters implemented by ParameterSets: each set contains a String and an Integer parameter but ordered differently. Without the ordering constraint, they might be considered equal, and no overloading would be possible.