PlantUML is another excellent UML drawing tool. With a text description of your UML, it will provide a diagram.
Really useful for sequence diagrams. For example the following easy-to-read code …
@startuml
title Click & Collect
hide footbox
actor User
mainframe Sequence Diagram
User -> Web: Reserve Item
Web -> Store: Check Stock
Web <-- Store: Stock Levels
alt Stock Available
Web -> Store: Reserve Stock
Web <-- Store: Stock Reserved
User <-- Web: Reservation Number
else Stock Unavailable
User <-- Web: Out of Stock Error
opt Special Order
User -> Web: Customer Special Order
Web -> Store: Order Stock
Store -> Warehouse: Order Stock
Store <-- Warehouse: Delivery Number
Store -> Store: Allocate Inbound Stock
Web <-- Store: Order Number
User <-- Web: Customer Special Order Number
end
end
@enduml
… produces a sequence diagram:
Just copy the above code into http://www.plantuml.com/plantuml. There are various ways to use PlantUML - not just via an online server.
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