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You can actually use -left->, -right->, -up-> and -down->, to explicitly select a direction. UML Sequence Diagram A UML Sequence diagram shows how messages go back and forth between objects over time. Note right of Joe : use of -> as the arrow from Fred to HR makes the line vertical rather than horizontal. The PlantUML to generate this was: : Result of Gossip Clean and fast online sequence diagram tool using scripting and Drag and Drop. The activity diagram beta syntax does almost what I want a horizontal flow chart just that it is vertical. Compare PlantUML VS and find out whats different. Here’s a simple use case with Fred and Joe again: But if I remove it, it generates a sequence diagram: 'First Activity' -> 'Second Activity' -> 'Third Activity' Figure 7: Sequence Diagram Activity Diagram Beta Activity Diagram Beta. HostB -> HostA : not limited to two endpoints, of course: Use Case Diagrams To create this, I used the following PlantUML: : TCP Exchange
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Here’s a simple example of a TCP exchange: Sequence diagrams are probably the simplest to build, and are absurdly fast to create. It’s easy to try online at where there is a text editor with real time image updates as you add more content. PlantUML uses a relatively simple text language to describe the desired diagram, then makes generation of the image as simple as processing the UML file. PlantUML is an open-source markup-language-to-UML-diagram tool in Java that deserves to be. Exclude classes from diagram by Settings > Tools > Sequence Diagram Smart Interface(experimental) Lambda. His advice is usually good, and this is no exception. Export the diagram as PlantUML, Mermaid format file. A colleague at work recently told me that I should check out PlantUML.