Fig25. Functional structure
of the application: user-side
3.3.5 Interaction Diagram
Interaction diagrams are models that describe how a group of
objects collaborate in some behavior typically a single use-case. The diagram
shows a number of example objects and messages that are passed between these
objects within the use-case.
I'll illustrate the approach with some examples of use-cases, but
firstly I will present interaction diagrams related with the application logic
architecture: they are Data Access Object and Session Façade diagrams.
They let us understand the conduct of each layer object very well.
Their textual description is mentioned in 3.3.1.2 and 3.3.1.1
parts.
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