Do we need to represent the alternative flow also in a single sequence diagram. For example pay for itinerary use case has normal flow and an alternate flow paying using miles. Do we need to represent both of them in the same sequence diagram or can have seperate sequence diagram for both the flows.
Originally posted by giuseppe fanuzzi: i think that you can display both case in the same sequence diagram. Also with uml2 you can have a frame with the label "alt" that represents a conditional logic.
Indeed and with UML 1.x you can use conditions with the message notated within square brackets.