2.2.5 [W3C-XSD] Section 3.2.14, gMonth


The specification states:

 Since the lexical representation allows an optional time zone indicator, gMonth 
 values are partially ordered because it may not be possible to unequivocally 
 determine the order of two values one of which has a time zone and the other 
 does not. If gMonth values are considered as periods of time, the order relation 
 on gMonth is the order relation on their starting instants. This is discussed in 
 Order relation on dateTime (§ See also Adding durations to dateTimes (§E). 
 Pairs of gMonth values with or without time zone indicators are totally ordered.


Indeterminate comparisons are considered to be determinate.