### Specifying Multiple Values in Calendar Expressions

You can specify multiple values in calendar expressions in the following
ways:

#### Using Wildcards in Calendar Expressions

Setting an attribute to an asterisk symbol (`*`) represents
all allowable values for the attribute.

##### Example 16–9 Calendar Expressions with Wildcards

The following expression represents every minute:

minute="*"

The following expression represents every day of the week:

dayOfWeek="*"

#### Specifying a List of Values

To specify two or more values for an attribute, use a comma (`,`)
to separate the values. A range of values are allowed as part of a list. Wildcards
and intervals, however, are not allowed.

Duplicates within a list are ignored.

##### Example 16–10 Calendar Expressions with a List of Values

The following expression sets the day of the week to Tuesday and Thursday:

dayOfWeek="Tue, Thu"

The following expression represents 4:00 AM, every hour from 9:00 AM
to 5:00 PM using a range, and 10:00 PM:

hour="4,9-17,20"

#### Specifying a Range of Values

Use a dash character (`-`) to specify an inclusive
range of values for an attribute. Members of a range cannot be wildcards,
lists, or intervals. If the range is of the form `x-x`, it
is equivalent to the single-valued expression `x`. If the
range is of the form `x-y` and `x` is greater
than `y`, it is equivalent to the expression `x-``maximum value`, `minimum value`-y.
That is, the expression begins at `x`, rolls-over to the
beginning of the allowable values, and continues up to `y`.

##### Example 16–11 Calendar Expressions Using Ranges

The following expression represents 9:00 AM to 5:00 PM:

hour="9-17"

The following expression represents Friday through Monday:

dayOfWeek="5-1"

The following expression represents the 25th day of the month to the
end of the month, and the beginning of the month to the 5th day of the month:

dayOfMonth="25-5"

It is equivalent to the following expression:

dayOfMonth="25-Last,1-5"

#### Specifying Intervals

The forward slash (`/`) constrains an attribute to
a starting point and an interval. It is used to specify every `N` seconds,
minutes, or hours within the minute, hour or day. For an expression of the
form `x/y`, `x` represents the starting
point and `y` represents the interval. The wildcard character
may be used in the `x` position of an interval, and is equivalent
to setting `x` to `0`.

Intervals may only be set for `second`, `minute`,
and `hour` attributes.

##### Example 16–12 Calendar Expressions Using Intervals

The following expression represents every 10 minutes within the hour:

minute="*/10"

It is equivalent to:

minute="0,10,20,30,40,50"

The following expression represents every two hours starting at noon:

hour="12/2"