This module is introduced to a program by (use-modules (mcron
job-specifier)).
This module provides all the functions available to user's Guile
configuration files, namely range, next-year-from,
next-year, next-month-from, next-month,
next-day-from, next-day, next-hour-from,
next-hour, next-minute-from, next-minute,
next-second-from, next-second,
and last but not least, job. See Guile Syntax for full
details.
Once this module is loaded, a scheme configuration file can be used to
put jobs onto the job list simply by loading the file.