A subscription is the means for specifying
a response to one or more events.
About this task
A subscription has the following elements:
Subscription target: the objects upon which the subscription
acts
Events
Event action or workflow (or both)
Creating a subscription
To associate an event with an event action (a programmatic
response), create a subscription for an object or a class. If you
create a subscription for a class, the subscription applies to all
objects that belong to that class. Class subscriptions, however, do
not show up on the Subscription list for the
object.
Subscription target
The target for a subscription is the object on which the
subscription acts. The subscription target determines the events that
can be selected for a subscription.