21     result = .not. time1 > time2
    35     result = .not. diff1 > diff2
    48     integer, 
intent(in):: factor
    50     result = .not. diff > factor
    62     integer, 
intent(in):: factor
    65     result = .not. factor > diff
 logical function dcdatetime_le_tt(time1, time2)
 
logical function dcdatetime_le_fi(diff, factor)
 
logical function dcdatetime_le_if(factor, diff)
 
logical function dcdatetime_le_ff(diff1, diff2)