5.3.1.1.3 Source Process Tab
The Source Process Tab is to be used to specify an Allocation Rule's Data Source.
For a Constant Type Allocation Rule, you need to specify an amount as follows:
Figure 5-9 Allocation Specification Source Process Tab
![The Allocation Specification Source Process Tab allow you to define an amount for a Constant type of Allocation Rule. The Allocation Specification Source Process Tab allow you to define an amount for a Constant type of Allocation Rule.](img/allocation_specification_source_process_tab.png)
For all other types of Allocation Rule, the Source Process Tab contains the Source Definition Pane, the Source Dimension Container, and Other Filters Pane.
Figure 5-10 Source Process Tab for all rule types except Constant type
![This screen displays the rule types for all other rule types except the Constant type. This screen displays the rule types for all other rule types except the Constant type.](img/source-process-tab-all-rule-types-constant-type-new.png)