You have created attribute definitions in the SAP NetWeaver Developer Studio. For more information, see Creating Attribute Definitions .
Context
In the ES Builder, you can only assign values to the attribute definitions created in the SAP NetWeaver Developer Studio.
Procedure
Open the interface object for which you want to assign values to custom attributes.
Choose Show/Hide Custom Attributes .
The Custom Attributes section appears at the bottom of the editor. This section displays all the attribute definitions assigned to the selected interface object.
Select an attribute definition and specify a value.
If the input values are predefined, select a value from the dropdown list.
Repeat step 3 to assign values to all the custom attributes.