title Labyrinth Bowie -> Goblin: You remind me of the babe Goblin -> Bowie: What babe? Bowie -> Goblin: The babe with the power Goblin -> Bowie: What power? note right of Bowie, Goblin: Most people get muddled here! Bowie -> Goblin: "The power of voodoo" Goblin -> Bowie: "Who-do?" Bowie -> Goblin: You do! Goblin -> Bowie: Do what? Bowie -> Goblin: Remind me of the babe! Bowie -> Audience: Sings terminators box 

title Connection Types begin Foo, Bar, Baz Foo -> Bar: Simple arrow Bar --> Baz: Dashed arrow Foo <- Bar: Reversed arrow Bar <-- Baz: Reversed & dashed Foo <-> Bar: Double arrow Bar <--> Baz: Double dashed arrow # An arrow with no label: Foo -> Bar Bar ->> Baz: Different arrow Foo <<--> Bar: Mix of arrows Bar -> Bar: Bar talks to itself Foo -> +Bar: Foo asks Bar -Bar --> Foo: and Bar replies Bar -x Baz: Lost message # Arrows leaving on the left and right of the diagram [ -> Foo: From the left [ <- Foo: To the left Foo -> ]: To the right Foo <- ]: From the right [ ~> ]: Wavy left to right! # (etc.) 

title Dividers begin Foo, Bar, Baz Foo -> +Bar divider Bar -> +Baz divider delay: This takes a while -Baz --> Bar divider tear with height 20: Lots of stuff happens -Bar --> Foo 

title Note Placements begin Foo, Bar note over Foo: Foo says something note left of Foo: Stuff note right of Bar: More stuff note over Foo, Bar: "Foo and Bar on multiple lines" note between Foo, Bar: Link # in long diagrams, we can add reminders of which agent is which: relabel text right: "Comments\nOver here!" state over Foo: Foo is ponderous 

title At the Bank begin Person, ATM, Bank Person -> ATM: Request money ATM -> Bank: Check funds if fraud detected Bank -> Police: "Get 'em!" Police -> Person: "You're nicked" end Police else if sufficient funds ATM -> Bank: Withdraw funds repeat until "all requested money has been handed over" ATM -> Person: Dispense note end else ATM -> Person: Error end 

autolabel "[<inc>] <label>" begin "Underpants\nGnomes" as A A <- ]: Collect underpants A <-> ]: ??? A <- ]: Profit! 

title "My Multiline Title" begin Foo, Bar note over Foo: "Also possible\nwith escapes" Foo -> Bar: "Lines of text\non this arrow" if "Even multiline\ninside conditions like this" Foo -> "Multiline\nagent" end state over Foo: "Newlines here, too!" 

theme sketch title Mockup A thing -> +Another thing: Something happens -Another thing --> A thing: With some response note right of Another thing: Find out what happens here end Another thing 

title "Baz doesn't live long" note over Foo, Bar: Using begin / end begin Baz Bar -> Baz Baz -> Foo end Baz note over Foo, Bar: Using * / ! # * and ! cause agents to be # created and destroyed inline Bar -> *Baz: make Baz Foo <- !Baz: end Baz # Foo and Bar end with black bars terminators bar # (options are: box, bar, cross, fade, none) 

define My complicated agent name as A define "Another agent name, and this one's multi-line!" as B A -> B: this is much easier A <- B: than writing the whole name 

define "Name with **bold** and _italic_" as A define "Also `code` and ~strikeout~" as B A -> B: "_**basic markdown is supported!**_" 

define Baz, Foo Foo -> Bar Bar -> Baz 

begin User, Application, PostgreSQL User -> +Application Application -> +PostgreSQL -PostgreSQL --> Application -Application --> User User is a person PostgreSQL is a database 

begin Initiator as I, Receiver as R # the '...id' syntax allows connections # to span multiple lines I -> ...fin1 ...fin1 -> R: FIN # they can even inter-mix! R -> ...ack1 R -> ...fin2 ...ack1 -> I: ACK ...fin2 -> I: FIN !I -> ...ack2 ...ack2 -> !R: ACK 

begin A, B, C, D A -> C # Define a marker which can be returned to later some primary process: A -> B B -> A A -> B B -> A # Return to the defined marker # (should be interpreted as no-higher-then the marker; may be # pushed down to keep relative action ordering consistent) simultaneously with some primary process: C -> D D -> C end D C -> A # The marker name is optional; using "simultaneously:" with no # marker will jump to the top of the entire sequence. 

# This is a comment 

title "My title here" 

title "My title here" title My title here title "My title" here title "My" "title" "here" 

# Draw an arrow from agent "Foo Bar" to agent "Zig Zag" with a label: # (implicitly creates the agents if they do not already exist) Foo Bar -> Zig Zag: Do a thing # With quotes, this is the same as: "Foo Bar" -> "Zig Zag": "Do a thing" 

if something Foo -> Bar else if something else Foo -> Baz if more stuff Baz -> Zig end end