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HOW TO DRAW CATALYSIS DIAGRAMS (cont'd)


Interaction Diagrams
Interaction diagrams illustrate actions between related objects. Model these diagrams using flowchart principles as illustrated below or by using sequence diagrams.

An interaction diagram
An interaction diagram


Interaction Diagram Notations

Action

Action
Illustrate actions with ovals.
Learn how to drop an oval on a line.

Message flow

Message flow
Indicate message sequence by numbering actions using the Dewey decimal system.



Sequence Diagrams
A sequence diagram is a type of interaction diagram that highlights the interdependencies between messages.

Two possible sequence diagrams
Two possible sequence diagrams