July 2001
Intermediate to advanced
656 pages
15h 51m
English
book
Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition
by Craig Larman
Content preview from Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition
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15.7. Basic Sequence Diagram Notation
Links
Unlike collaboration diagrams, sequence diagrams do not show links.
Messages
Each message between objects is represented with a message expression on an arrowed line between the objects (see Figure 15.17). The time ordering is organized from top to bottom.
Figure 15.17. Messages and focus of control with activation boxes.
Focus of Control and Activation Boxes
As illustrated in Figure 15.17, sequence diagrams may also show the focus of control (that is, in a regular blocking call, the operation is on the call stack) using an activation box. The box is optional, but commonly used by UML practitioners. ...
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