Building the Action Diagram › How to Define Logic for Elementary Processes and Procedures › Add Control Actions › Add USE Action

Add USE Action

The USE action allows you to call other action blocks from procedure and action blocks. The called action block cannot be a Procedure Step or a derivation algorithm.

In the Action Diagram, after selecting USE, you select the action block to be used. You then match import views, export views, local views, and entity action views.

The following example shows how a USE statement references an action block called find_space: The views in the WHICH IMPORTS list populate the import view of the action block before it begins execution. The views in the WHICH EXPORTS list are populated from the export view of the action block on return.

USE find space
WHICH IMPORTS: Group View product information
Entity View storage_space warehouse
WHICH EXPORTS: Entity View used warehouse

The following example shows how a USE statement references an action block called create_order:

USE create_order
WHICH IMPORTS: Group View group_import Entity View import customer Entity View import customer_order
WHICH EXPORTS: Group View group_export Entity View export customer Entity View customer_order

In the following example, another form of the USE action SETs the value of an attribute USING an algorithm:

SET employee_number USING number_generator

After you select the algorithm, CA Gen prompts you to match the import views of the algorithm with the supplying views from the process.