TOSCA defines three concepts for Policy: Policy Type, Policy, and Trigger.
-.. image:: images/ToscaPolicyStructure.png
+.. image:: images/TOSCAPolicyConcepts.svg
:width: 800
Policy Type
* its event_type, which defines the name of the event that fires the policy
* its schedule, which defines the time interval in which the trigger is active
* its target_filter, which defines specific filters for firing such as specific characteristics of the nodes or
-relations for which the trigger should or should not fire
+ relations for which the trigger should or should not fire
* its condition, which defines extra conditions on the incoming event for firing the trigger
* its constraint, which defines extra conditions on the incoming event for not firing the trigger
* its period, which defines the period to use for evaluating conditions and constraints
* its evaluations, which defines the number of evaluations that must be performed over the period to assert the
-condition or constraint exists
+ condition or constraint exists
* its method, the method to use for evaluation of conditions and constraints
* its action, the workflow or operation to invoke when the trigger fires