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Salesforce Platform features (MVC pattern)

controller can send commands to its associated view to change the view’s presentation of the model (e.g., by scrolling through a document). It can also send commands to the model to update the model’s state (e.g., editing a document).

model notifies its associated views and controllers when there has been a change in its state. This notification allows the views to produce updated output, and the controllers to change the available set of commands.

view requests from the model the information that it needs to generate an output representation.

Some Examples:
1. Visual Force pages, Page Layouts, Tabs comes under View Layer of Model View controller .
2. Workflows, Apex Classes, Triggers, Validation Rules comes under Controller part in Model View controller .
3. Objects, Fields, Relationships comes under Model Layer of Model View Controller .


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