Test case for seconds() function 7.10.4.a seconds() function You should see '0' for seconds('P1Y2M'). seconds('P1Y2M') : You should see '297001.5' for seconds('P3DT10H30M1.5S'). seconds('P3DT10H30M1.5S') : You should see 'NaN' for seconds('3'). seconds('3') :