Service Development Help : Building Services : About the Service Signature : Declaring Input and Output Parameters : Inserting Input and Output Parameters
Inserting Input and Output Parameters
You can define a service signature by dragging variables from the Palette view to the Input or Output side of the Input/Output tab.
To declare input and output parameters for a service
1. In the Package Navigator view, open the service for which you want to declare input and output parameters.
2. Click the Input/Output tab.
3. If the Palette view is not visible, display it by clicking on the right side of the editor.
4. In the Palette view, select the type of variable you want to define and drag it to the Input or Output side of the Input/Output tab.
5. Type a name for the variable and press ENTER.
6. With the variable selected, set variable properties and apply constraints using the Properties view.
7. If the variable is a document or document list, add child variables to define the content of the document or document list. Use to indent each member beneath the document or document list variable.
Note:  
You can add a document reference to a service signature by selecting an IS document type in the Package Navigator view and dragging it to the Input/Output tab.
8. Click File > Save.
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