be delayed Admin- … UML sequence diagrams are useful design tools because they provide a dynamic view of the system behavior which can be difficult to extract from static diagrams or specifications. Integrations; Blog ; FAQ; Forum; Self Hosting; LOGIN REGISTER. You get both a visual representation, called the diagram, and the internal structure of your model in a tree-based representation. Purpose: An example of high level UML sequence diagram for Online Bookshop.. Summary: Online customer can search book catalog, view description of a selected book, add book to shopping cart, do checkout. Sequence Diagram of an Online Exam System. Toggle navigation. Draw; Pricing; Help . Software Development . Works cross-platforms: Mac, Windows, Linux. Sequence diagrams are sometimes known as event diagrams or event scenarios.