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Notification Manager Parameter Levels

Notification Manager must have a very general view of parameters. To Notification Manager, parameters are simply strings that are passed to the appropriate method.

The most important consideration with parameters is the assigning of default values. Default values save typing, reduce data entry errors, and make implementing changes easier. On the other hand, some parameters cannot have a default (for example, the phone number for a particular contact). Notification Manager handles this diversity by providing the following three-level scheme in which to store parameter values: