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UML State Model

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Content may include inaccuracies, outdated information, or technical errors. Users are advised to cross-check critical information before implementation.

The notation follows UML state diagrams: the states of an object and the transitions between them.

A PlantUML state diagram: an initial state, three states and a final state

Create the model and the machine​

Create a model of the type PlantUML State Model and open its diagram.

Click the background and create an Initial State, the states New, In progress and Closed, and a Final State. Join them with Transition relationships:

  • initial state → New;
  • New → In progress, named accept;
  • In progress → Closed, named complete;
  • Closed → final state.

A transition joins two states with the same owner, so all four transitions stay at the top level of the model.

A composite state​

The state In progress covers several stages. Click it and create a State Picking inside. A Region appears within In progress - the dashed frame around Picking.

Add the states Packing and Shipping to the same region, and an Initial State before Picking. Join them in order. Transitions drawn inside a region belong to the region, so the inner sequence stays with the composite state.

A second region​

If shipping and invoicing happen at the same time, click In progress and choose Region. A second frame appears next to the first: fill it with the states Invoicing and Invoiced, each with its own initial state.

Two regions of one state work in parallel: the order passes through both at once.