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PlantUML Language specification Hyperlink

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Format definition

Simple link

Simple links are define using two square brackets (or three square brackets for field or method on class diagram).

Example:
  • [[http://plantuml.com]]
  • [[]] (empty link)

Link with optional label

It is possible to give an optional label that will be printed instead of the link itself. A space is used as separator after the URL itself.

Example: [[http://plantuml.com This label is printed]]

Link with optional tooltip

Finally you can also have an optional tooltip using round brackets, just after the URL and before the optional label.

Example: [[http://plantuml.com{Optional tooltip} This label is printed]]

Only tooltip

You can also have only a tooltip using round brackets.

Example: [[{A tooltip}]]

Only tooltip and label

You can also have only a tooltip using round brackets, and a label.

Example: [[{A tooltip} This label is printed]]

URL authentication

With URL authentication it is possible to provide an authentication method, credentials, and a proxy config to URL endpoints.

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Links contained curly bracket

A link can contain some curly brackets.

🎉 Copied! 

@startuml
[[link{with_bracket}&id=10]]:Some activity\n(with link with brackets)\n""link{with_bracket}&id=10"";
[["link{with_bracket}"{}]]:Some activity\n(with link with brackets and empy tooltip)\n"""link{with_bracket}"{}"";
[["link{with_bracket}"{with tooltip}]]:Some activity\n(with link finished by brackets and tooltip)\n"""link{with_bracket}"{with tooltip}"";
[["link{with_bracket}&id=10"{with tooltip}]]:Some activity\n(with link with brackets and tooltip)\n"""link{with_bracket}&id=10"{with tooltip}"";
@enduml

[Ref. QA-13489]

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Links in sequence diagram

The following example lists some links features:

🎉 Copied! 

@startuml
actor Bob [[http://plantuml.com/sequence]]
actor "This is [[http://plantuml.com/sequence Alice]] actor" as Alice
Bob -> Alice [[http://plantuml.com/start]] : hello
note left [[http://plantuml.com/start]]
  a note with a link
end note
Alice -> Bob : hello with [[http://plantuml.com/start{Tooltip for message} some link]]
note right [[http://plantuml.com/start]] : another note
note left of Bob
You can use [[http://plantuml.com/start links in notes]] also.
end note
@enduml

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Links in class diagram

🎉 Copied! 

@startuml
class Car [[http://plantuml.com/link]]
class Wheel [[http://plantuml.com/sequence]]
note left [[http://plantuml.com]]
foo
end note
Car *-- Wheel [[http://plantuml.com/class]] : has some
@enduml

There is a special syntax with 3 square brackets in class definition when you want to define a link on field or method. For example:

🎉 Copied! 

@startuml
class Car {
  - Some field [[[http://plantuml.com]]]
  Some method() [[[http://plantuml.com/link]]]
}
@enduml

🎉 Copied! 

@startuml
Object <|-- Foo

class Foo {
  + Object[]   [[[http://www.google.com]]]
  + methods1() [[[http://www.yahoo.com/A1{Some explainations about this method}]]]
  + methods2() [[[http://www.yahoo.com/A2]]]
}
  
class Foo2 {
  + methods1() [[[http://www.yahoo.com/B1]]]
  + methods2() [[[http://www.yahoo.com/B2]]]
}
  
class Object [[http://www.yahoo.com]]
@enduml

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Links in activity diagram

On activity label

🎉 Copied! 

@startuml
start
[[http://plantuml.com]]:Some activity;
:Some [[http://plantuml.com link]];
end
@enduml

On partition

🎉 Copied! 

@startuml
start
partition "[[http://plantuml.com partition_name]]" {
    :read doc. on [[http://plantuml.com plantuml_website]];
    :test diagram;
}
end
@enduml

[Ref. QA-542]

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Link in State diagram

You can add link on State diagram:
  • local link on a word
  • or link on the entire state shape

🎉 Copied! 

@startuml
state state1 [[http://plantuml.com/link]]
state state2 [[http://plantuml.com/state{this is a tooltip\nand a link to "plantuml/state"}]]
state2 : a global link\nand a tooltip
note left [[http://plantuml.com]]
a note
and a link
to ""plantuml.com""
end note
state3 : a local link to [[http://plantuml.com plantuml]]

state1 --> state2
state2 --> state3
@enduml

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Links in Network diagram (nwdiag)

🎉 Copied! 

@startuml
nwdiag {
  network Network {
      Server [description="A [[http://plantuml.com link]] on nwdiag"];
  }
}
@enduml

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Links in JSON/YAML diagram

JSON

🎉 Copied! 

@startjson
{
"@fruit": "Apple",
"$size": "Large",
"Appli.": "A [[http://plantuml.com link]] on JSON"
}
@endjson

YAML

🎉 Copied! 

@startyaml
@fruit: Apple
$size: Large
Appli.: A [[http://plantuml.com link]] on YAML
@endyaml

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Links in notes

It is also possible to specify a link at the beginning of a note (the link applies to the full note), or inside a note (for a portion of the note).

🎉 Copied! 

@startuml
:Foo:
note left of Foo [[http://www.google.com]]
This is a note
end note

note right of Foo
Yet another link to [[http://www.google.com]] as demo.
You can also [[http://www.yahoo.fr specify a text]] for the link.
And even [[http://www.yahoo.fr{This is a tooltip} add a tooltip]] to the link.
end note
@enduml

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Links with explicit URL directive

You can use the url of XXX is [[yyy]] syntax:

On sequence diagram

🎉 Copied! 

@startuml
Bob -> Alice : ok
url of Bob is [[http://www.google.com]]
@enduml

On class diagram

🎉 Copied! 

@startuml
skinparam topurl http://www.google.com
Dog --|> Mammal
url of Mammal is [[/search]]
url of Dog is [[http://www.yahoo.com{This is Dog}]]
Dog o-- Cat
Cat --|> Mammal
@enduml

On usecase diagram

🎉 Copied! 

@startuml
actor Mamal
usecase Dog

url of Mamal is [[http://www.google.com]]
url of Dog is [[http://www.yahoo.com{This is Dog}]]
@enduml

On component or deployment diagram

🎉 Copied! 

@startuml
node Mamal
component Dog

url of Mamal is [[http://www.google.com]]
url of Dog is [[http://www.yahoo.com{This is Dog}]]
@enduml

[Ref. Incubation: URL in diagrams]

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Links in arrow (or Hyperlinks in link or connection)

Class diagram

You can use the same syntax as above in the arrow name. It makes an underlined link:

🎉 Copied! 

@startuml
class Car 
Car "1" *-- "*" Wheel : [[http://plantuml.com/class-diagram has some]]
@enduml

Or you can use this syntax. It doesn't underline the link, though it's still clickable:

🎉 Copied! 

@startuml
class Car 
Car "1" *-- "*" Wheel [[http://plantuml.com/class-diagram]] : has some
@enduml

Component or Deployment diagram

FIXME
🚩 See Wanted features QA-6397
FIXME

🎉 Copied! 

@startuml
node Car 
Car *-- Wheel [[http://plantuml.com/deployment-diagram]] : has some
@enduml

[Ref. QA-6397]

State diagram

FIXME
🚩 Same Issue
FIXME

🎉 Copied! 

@startuml
state Car
state CarWithWheel
Car -> CarWithWheel [[http://plantuml.com/state-diagram]] : Add wheel to car
@enduml

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Specific SkinParameter for Link

hyperlinkColor

You can change the color value of the links with the hyperlinkColor setting.

🎉 Copied! 

@startuml
:hyperlinkColor setting, by default;
:[[http://plantuml.com]];
@enduml

🎉 Copied! 

@startuml
skinparam hyperlinkColor red
:hyperlinkColor setting;
:[[http://plantuml.com]];
@enduml

[Ref. QA-2322]

hyperlinkUnderline

You can use hyperlinkUnderline to specify the presence and (in PNG only) thickness of hyperlink underlines.

🎉 Copied! 

@startuml
skinparam hyperlinkUnderline false
:hyperlinkColor setting;
:[[http://plantuml.com]];
@enduml

🎉 Copied! 

@startuml
skinparam hyperlinkUnderline 1
:hyperlinkColor setting;
:[[http://plantuml.com]];
@enduml

🎉 Copied! 

@startuml
skinparam hyperlinkUnderline 5
:hyperlinkColor setting;
:[[http://plantuml.com]];
@enduml

[Ref. QA-2866, QA-15114, GH-1241, GH-1411]

topurl

You can use topurl setting, in order to define the prefix for all the links on a PlantUML diagram, as:

🎉 Copied! 

@startmindmap

skinparam topurl https://plantuml.com/

* [[index PlantUML website]]
** [[sequence-diagram Sequence]]
** [[mindmap-diagram MindMap]]
** [[wbs-diagram WBS]]
** ...
@endmindmap

[Ref. QA-9016, QA-13179 ]

Other SkinParameter for Link

You can see also on:

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Using (global) style

Without style (by default)

🎉 Copied! 

@startuml
title test on HyperlinkColor [[test link]]

 class test <<normal>> {
  * aaa
  + [[normal model]]
  - bb
 }
 
  class test_with_stereo AS "[[http://www.plantuml.com test]]" <<red>> {
  * aaa
  + [[red model]]
  - bb
 }
@enduml

With style

You can use style to change rendering of elements.

🎉 Copied! 

@startuml
<style>
.red {
  HyperlinkColor #FF0000
}
</style>

title test on HyperlinkColor [[test link]]

 class test <<normal>> {
  * aaa
  + [[normal model]]
  - bb
 }
 
  class test_with_stereo AS "[[http://www.plantuml.com test]]" <<red>> {
  * aaa
  + [[red model]]
  - bb
 }
@enduml

[Ref. QA-8071]

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