NAME

       Data::ICal::Entry::Alarm - Abstract base class for alarms

DESCRIPTION

       Data::ICal::Entry::Alarm is an abstract base class for the other type of supported by
       alarms:

       Data::ICal::Entry::Alarm::Audio
       Data::ICal::Entry::Alarm::Display
       Data::ICal::Entry::Alarm::Email
       Data::ICal::Entry::Alarm::Procedure

       It is a subclass of Data::ICal::Entry and accepts all of its methods.

METHODS

   new
   ical_entry_type
       Returns "VALARM", its iCalendar entry name.

   optional_unique_properties
       According to the iCalendar standard, the "duration" and "retreat" properties may be
       specified at most one time all types of alarms; if one is specified, the other one must be
       also, though this module does not enforce that restriction.

   mandatory_unique_properties
       According to the iCalendar standard, the "trigger" property must be specified exactly once
       for an all types of alarms; subclasses may have additional required properties.

       In addition, the "action" property must be specified exactly once, but all subclasses
       automatically set said property appropriately.

AUTHOR

       Best Practical Solutions, LLC <modules@bestpractical.com>

LICENCE AND COPYRIGHT

       Copyright (c) 2005 - 2020, Best Practical Solutions, LLC.  All rights reserved.

       This module is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself. See perlartistic.