Event subscription properties (Configuration tab)

Identifies and lets you edit configuration settings for the event subscription.

State

Enabled
Select Enabled to enable the subscription. Clear the check box to disable it.
Include Subclasses
Select if you want the subscription to apply to subclasses of the object.
Synchronous
Determines whether the event action assigned to the subscription runs as a synchronous or asynchronous execution. A selected check box indicates the event action runs in synchronous mode. A cleared check box indicates the event action runs in asynchronous mode.

CAUTION  Always clear this option to run workflow subscriptions in asynchronous mode. Launching a workflow takes more time than a synchronous event can handle. A Workflow subscription must run in asynchronous mode to prevent the action from timing out before launching the workflow successfully.

Filter Expression (optional)
This optionally holds an expression, in the same format as the WHERE clause of a query but allowing only a subset of the operators, that is evaluated against the source object or an object referenced by the source object for an event, to determine whether the subscription should "fire".
Filter Property Name (optional)
Optionally specifies the symbolic name of a property, which must be a singleton object-valued property of the source object. If set, the filter expression is applied to the object referenced by that property, rather than to the source itself. (An example of how this would be used is for an "element added" event, where the source object is an RCR, but by specifying Head as the FilteredProperty, a condition can be evaluated against the object filed).