Sequence diagram commands for command driven diagramming

Create a document with “Command drive” style and type commands into the field. Then click “Build” button or press a shortcut Cmd+R. You can add additional shapes from the palette which will be preserved after rebuild.

Participants

sequenceDiagram
	    participant John
	    participant Alice
	    Alice->>John: Hello John, how are you?
	    John-->>Alice: Great!

The participants can be defined implicitly as in the first example on this page. The participants or actors are rendered in order of appearance in the diagram source text. Sometimes you might want to show the participants in a different order than how they appear in the first message. It is possible to specify the actor’s order of appearance by doing the following:

Messages

[Actor][Arrow][Actor]:Message text

Messages can be of two displayed either solid or with a dotted line. There are six types of arrows currently supported:

which will render a solid line without arrow

Alice->John: Hello John, how are you?

–>

which will render a dotted line without arrow

Alice-->John: Hello John, how are you?

->>

which will render a solid line with arrowhead

Alice->>John: Hello John, how are you?

–>>

which will render a dotted line with arrowhead

Alice-->>John: Hello John, how are you?

-x

which will render a solid line with a cross at the end (async)

Alice-xJohn: Hello John, how are you?

–x

which will render a dotted line with a cross at the end (async)

Alice--xJohn: Hello John, how are you?

Notes

Note [ right | left ] of [Actor]: Text in note content

sequenceDiagram
	    participant John
	    Note right of John: Text in note

It is possible to add notes to a sequence diagram. This is done by the notation Note [ right | left ] of [Actor]: Text in note content

Loops

loop Loop text
	... statements ...
	end

sequenceDiagram
	    Alice->John: Hello John, how are you?
	    loop Reply every minute
	        John-->Alice: Great!
	    end

Alt

alt Describing text
	... statements ...
	else
	... statements ...
	end

or if there is sequence that is optionat (if without else).

opt Describing text
	... statements ...
	end

sequenceDiagram
	      Alice->>Bob: Hello Bob, how are you?
	        alt is sick
	            Bob->>Alice: Not so good :(
	        else is well
	            Bob->>Alice: Feeling fresh like a daisy
	        end
	        opt Extra response
	            Bob->>Alice: Thanks for asking
	        end