Simple assignment mappings are great for pinpoint changes. Simply, use the equal sign to assign values.
Assign a static value:
OutboundMessage.nodepath = “Smith”
Assign a value from another message:
OutboundMessage.nodepath = InboundMessage.nodepath
Assign the result of a function:
OutboundMessage.nodepath = SomeFunction()
For example, you could call a function performing Codeset Lookups.