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UML Has How Many Diagram Types?
publish date: 2026/06/09 19:47:13.320541 UTC
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The Unified Modeling Language (UML) includes how many different diagram types in total, and how many does a survey suggest are sufficient to represent the essentials of most systems?
Correct Answer
13 total; 5 are sufficient for most systems
Explanation
The UML has 13 diagram types. A survey showed that most UML users thought that five diagram types could represent the essentials of a system: activity diagrams, use case diagrams, sequence diagrams, class diagrams, and state diagrams.
Reference
Software Engineering, Ian Sommerville, 10th edition