Test case for xforms:yearMonthDuration datatype
5.2.4.a yearMonthDuration datatype
You should see a message "You entered a valid yearMonthDuration" after you enter in a valid
yearMonthDuration datatype (i.e. "P100Y1M" for 100 years, 1 month).
Length of car lease (yearMonthDuration)
You entered a valid yearMonthDuration.