  In this paper we present a variant of message sequence diagrams called EETs
Extended Event Traces We provide the graphical notation discuss the
methodological use of EETs to describe behavior of object oriented business
information systems and sketch their semantics Special emphasis is put on the
different implications of using EETs for exemplary and complete interaction
descriptions. The possibility to describe interactions between single objects
as well as composite objects with EETs makes them particularly suitable to
describe the behavior of large systems.
