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Software Design Center
HOW TO DRAW CATALYSIS DIAGRAMS (cont'd)
Sequence Diagram Notations
Action initiator
This symbol marks the object that initiates the message.
Learn how to drop these ovals on the line.
Action duration
Duration notations indicate the length of time needed to complete a task.
Messages
Use arrows or lines to represent communication between objects. Use half-arrowed lines to represent asynchronous messages. Asynchronous messages are sent from an object that will not wait for a response from the receiver before continuing its tasks.
Learn how to connect two objects.
Collaboration Diagrams
Collaboration diagrams illustrate actions that are grouped together because they serve a common purpose.
A collaboration diagram
Collaboration Diagram Notations
Collaboration
A box with three partitions and a dashed outline encloses all collaboration diagrams
Learn how to convert a shape into a table.
Action
Use ovals to represent actions.
Learn how to drop the ovals on a line.
