Guides
5 guides on class diagram. Practical writing from the team building Atlas, useful whether or not you buy anything.
An ER diagram and a UML class diagram can look almost identical (boxes with fields, lines between them) yet they answer different questions. Knowing which to reach for saves confusion.
A class diagram captures the static structure of an object-oriented design. PlantUML lets you write one as text, with precise control over members, visibility, and every relationship type.
The lines in a class diagram carry as much meaning as the boxes. This guide explains every relationship type, the notation for each, and simple tests for choosing the right one.
The class diagram is the most useful diagram in UML. This guide covers everything on the box, every line between boxes, and how to draw one that clarifies rather than clutters.
Class diagrams model the structure of object-oriented code. Mermaid lets you write them in text and keep them next to the code they describe.
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