The OraSubscriptions collection maintains a list of OraSubscription objects, which represent the subscription to a database event. Unlike the other collection objects, this list is modifiable; you can add to and remove from the collection.
You can access the OraSubscription objects in this collection by creating a subscript (using ordinal integers) or by using the name the object was given at its creation. You can obtain the number of OraSubscription objects in the collection by using the Count property. Referencing a subscript that is not within the collection (0 to Count-1) results in the return of a null OraSubscription object.
In addition to accessing the OraSubscription objects of the collection, you can use the collection to create and destroy subscriptions by using the Add and Remove methods, respectively.