Recurrences

Recurrences are embedded into
Schedules and Substitutions and define how something recurs over time.

There are three types of recurrences supported:

◊    Occurrence

◊    Repeat

◊    Periodic

Occurrence

Used for shiftSubstitution

Occurrence defines specific dates on which a configuration occurs.

Repeat

Used for staffSchedule

Repeat defines a period of time over which a configuration occurs. "To"
is optional and if omitted occurs infinitely.

Periodic

Used for staffSchedule

Periodic, similar to repeat, defines a period of time over which a configuration
occurs. However, periodic may occur "ever other" or "every n" times.