Model Elements and Relationships in Sequence Diagrams
The UML sequence diagrams produced by the UML/SD Viewer illustrate program interactions with an emphasis on the chronological order of messages.
| To learn about | See |
| Notation used to show when an instance (object or classifier role) is active | Activations |
| Model elements that represent roles played by classifiers participating in a collaboration | Classifier Roles |
| Notation used to show that an instance has been destroyed | Destruction Markers |
| Notation used to show the existence of an instance during an interaction | Lifelines |
| Model elements that represent communication between classifier roles | Messages |
| Model elements that represent instances of classifiers | Objects |
| Model elements that represent communication between objects | Stimuli |
| Non-standard model elements that represent thrown exceptions in C++ | Exceptions |
| Model element that describes a role that a user plays when interacting with the system being modeled | Actors |
| Non-standard model elements that represent a loop in the execution of a program | Loops |
| Non-standard model elements that are used to represent synchronization points when multiple files are viewed together | Synchronizations |
| Model elements that represent miscellaneous information such as comments or user-defined messages | Notes |
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