Separate Icons for Send and Respond Message Attributes
Oracle Workflow Builder now displays two different icons for message attributes. 'Send' message attributes still appear with the same Attribute icon used for item type and activity attributes. 'Respond' message attributes, however, now appear with an Attribute icon overlayed with a red question mark. These two icons help you visually distinguish between the two types of message attributes in the Navigator tree.
To Define a Message Attribute