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 subscripting
(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 does not lie 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.