Tutorials, guides, and best practices for UML diagramming
Explore copyable PlantUML examples for sequence, class, ER, C4, activity, component, and state diagrams, then learn how to style, save, and export them.
Control PlantUML layout with direction, containers, spacing, layout engines, and restrained relationship hints without fragile positioning hacks.
Learn why PlantUML newpage shows one image in OnUML and split long sequence diagrams into tabs that can be previewed, saved, and exported.
Build authentication and REST API flows with PlantUML participants, messages, activation bars, conditions, loops, and numbering.
Learn what WYSIWYG and drag-and-drop mean for PlantUML, what the language supports, and how to choose between text-first, visual, and hybrid editors.
Use Mermaid Crow's Foot notation for application schemas and PlantUML Chen notation for conceptual models. Compare keys, cardinality, scope, and tradeoffs.
Use Mermaid for service and resource maps, and PlantUML for component contracts, deployment views, C4 baselines, and formal architecture documentation.
Compare Mermaid and PlantUML for composite states, concurrent regions, history states, and entry or exit points in production state-machine documentation.
Compare Mermaid Flowchart and PlantUML activity syntax for branches, loops, fork/join, and early exits. Learn why formal activity models favor PlantUML.
Mermaid C4 remains experimental as of July 22, 2026. Compare its five views, documented limits, formal architecture fit, and governance with C4-PlantUML.
