README.md

Objects

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Component
Interface
Rectangle
Actor
Artifact

Component

@startuml
component [component] as myComponent
@enduml

Interface

@startuml
() "This is an interface" as myInterface
@enduml

Rectangle

@startuml
rectangle "This is a Rectangle"
@enduml

Rectangles can group other objects:

@startuml
rectangle "This is a Rectangle with things in it" {
    () " " as o1
    () " " as o2
    :Actor:
    [Component]
}
@enduml

Actor

Note that if you use keyword 'actor', it will assume format of a sequence diagram. Use colons around actor name instead.

@startuml
:"Alice":
@enduml

Can change colour etc with skinparams:

@startuml
skinparam ActorBorderColor black
skinparam ActorBackgroundColor white
:"Alice":
actor "Bob"
@enduml

Artifact

An artifact in UML is generally a file

@startuml
artifact "config.json"
@enduml