function
| Library: Date and time functions (OMDATE) Include: omdate.xin | Returns: the specified date/time rounded down to the nearest indicated interval | 
define string function 
   round-down-ymdhms    value string ymdhms
                     to value string interval
Argument definitions
YYYYMMDDhhmmss+ZHZM format. round-down-ymdhms takes a date/time in YYYYMMDDhhmmss+ZHZM format, and returns the same value
      but rounded down to the beginning of an interval indicated by the second argument. Only the shortest
      distinguishing prefix of the interval name is needed, so y can be used in place of year,
      but mo and mi are needed to distinguish between month and minute. This argument can be in either uppercase or lowercase. If this argument is unrecognized, the date/time
      will be returned unchanged.
      
 The following program takes the current date/time, and rounds it down to the nearest minute. 
          
include "omdate.xin" process local string now set now to now-as-ymdhms output "Now, unrounded = " || now || "%n" || "Now, rounded down to the minute = " || round-down-ymdhms now to "mi" || "%n"Running this example might yield output such as
Now, unrounded = 20191031155546-0400 Now, rounded down to the minute = 20191031155500-0400
To use round-down-ymdhms, you must include the following code near the top of your program:
        
include "omdate.xin"