<!--
  * dtd/scheduledTasks.dtd
  *
  * Copyright (c) 2014-2021 Simon Fraser University
  * Copyright (c) 2000-2021 John Willinsky
  * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
  *
  * DTD for scheduled tasks.
  -->

<!--
  * task - a single task to execute
  * class: the ScheduledTask class to instantiate and call execute() on
  * descr: description of the task
  * frequency: how often the task should be executed
  * arg: 0 or more arguments to pass in array to the class constructor
  -->
<!ELEMENT scheduled_tasks (task*)>
<!ELEMENT task (descr?,frequency?,arg*)>
	<!ATTLIST task
		class CDATA #REQUIRED>
<!ELEMENT descr (#PCDATA)>
<!ELEMENT frequency EMPTY>
	<!--
	  * The frequency settings take similar values as used in
	  * crontab entries
	  * E.g., "1", "2-3", "2-3,5,6", "*/2", "1-6/3", "*", etc.
	  * ("*" is assumed for any values that are omitted)
	  *
	  * The primary difference with crontab entries is that the task
	  * may not be executed at the exact specified time. E.g., if a
	  * task is set to execute at minute 0 of every hour, it will be
	  * executed if it has been more than one hour since the task
	  * was last run, regardless of the minute at the time the
	  * script is actually executed.
	  *
	  * minute: 0-59
	  * hour: 0-23
	  * day: 1-31
	  * month: 1-12
	  * dayofweek: 0-6 (Sunday-Saturday)
	  -->
	<!ATTLIST frequency
		minute CDATA #IMPLIED
		hour CDATA #IMPLIED
		day CDATA #IMPLIED
		month CDATA #IMPLIED
		dayofweek CDATA #IMPLIED>
<!ELEMENT arg (#PCDATA)>