10+ Sequence Diagram Conditional Loop. Guards are conditions attached to messages to indicate conditional execution or loops. Although sequence diagrams can be used to illustrate any interesting collaborations (sequences of related messages) among our objects, we most often draw one sequence diagram for each use case.
Types of messages in sequence diagrams. A uml sequence diagram shows how messages go back and forth between objects over time. Conditional diagramming method (cdm) is one way to create a diagram of a project.
Uml distilled, third edition, chapter 4.
10+ Sequence Diagram Conditional Loop. To indicate if or loop. Place the condition for exiting the loop at the bottom left corner in square brackets . To execute some code over and over again, we have the for loop. Sequence diagrams, commonly used by developers, model the interactions (find an example of a loop fragment below in the sequence diagram templates and example section).