plantuml参考手册

Drawing UML with PlantUML

Language Reference Guide

(Version 2017.08)

PlantUML is an Open Source project that allows to quickly write:

• Sequence diagram,

• Usecase diagram,

• Class diagram,

• Activity diagram,

• Component diagram,

The sequence -> is used to draw a message between two participants. Participants do not have to be

explicitly declared.

To have a dotted arrow, you use -->

It is also possible to use <- and <--. That does not change the drawing, but may improve readability.

Note that this is only true for sequence diagrams, rules are different for the other diagrams.

@startuml

Alice -> Bob: Authentication Request

Bob --> Alice: Authentication Response

Alice -> Bob: Another authentication Request

Alice <-- Bob: another authentication Response

• control

• entity

• database

@startuml

actor Foo1

boundary Foo2

control Foo3

entity Foo4

database Foo5

Foo1 -> Foo2 : To boundary

You can also change the background color of actor or participant.

@startuml

actor Bob #red

' The only difference between actor

'and participant is the drawing

participant Alice

participant "I have a really\nlong name" as L #99 FF99

/' You can also declare:

participant L as "I have a really \nlong name" #99FF99

'/

participants.

@startuml

Alice -> "Bob()" : Hello

"Bob ()" -> "This is very\nlong " as Long

' You can also declare :

' "Bob ()" -> Long as "This is very\nlong "

Long --> "Bob()" : ok

@enduml

1.4 Message to Self

A participant can send a message to itself.

• add a final x to denote a lost message

• use \ or / instead of < or > to have only the bottom or top part of the arrow

• repeat the arrow head (for example, >> or //) head to have a thin drawing

• use -- instead of - to have a dotted arrow

• add a final ”o” at arrow head

• use bidirectional arrow

@startuml

Bob ->x Alice

Bob -> Alice

Bob ->> Alice

Bob <->o Alice

@enduml

1.6 Change arrow color

You can change the color of individual arrows using the following notation:

@startuml

Bob -[# red]> Alice : hello

Alice -[#0000FF]->Bob : ok

@enduml

1.7 Message sequence numbering

The keyword autonumber is used to automatically add number to messages.

'start' 'increment'.

@startuml

autonumber

Bob -> Alice : Authentication Request

Bob <- Alice : Authentication Response

autonumber 15

Bob -> Alice : Another authentication Request

Bob <- Alice : Another authentication Response

autonumber 40 10