Returns true if the two xs:gMonth values have the same starting instant,
when considered as months in the same year.
xs:gMonth values. Also used
in the definition of the "ne" operator.op:gMonth-equal( $arg1 as xs:gMonth,$arg2 as xs:gMonthxs:booleanThe starting instants of $arg1 and $arg2 are calculated by
supplying the missing components of $arg1 and $arg2 from the
xs:dateTime template 1972-xx-01T00:00:00 or an equivalent.
The function returns the result of comparing these two starting instants using
op:dateTime-equal.
Assume that the dynamic context provides an implicit timezone value of
-05:00. Assume, also, that the xs:dateTime template
chosen is 1972-xx-01T00:00:00.
The expression op:gMonth-equal(xs:gMonth("--12-14:00"),
xs:gMonth("--12+10:00")) returns false().
The expression op:gMonth-equal(xs:gMonth("--12"),
xs:gMonth("--12Z")) returns false().