sverweij/mscgen_js

msc {
  # options - separate with , end with ;
  #
  # arcgradient=20, # slopes the arcs.
  # hscale="0.8", # horizontally squeezes or stretches the chart
  # width="600", # sets the maximum width of the chart (pixels).
  #              # xù and msgenny also allow the value 'auto' - it scales
  #              # rendered svg's to maximum available width.
  # watermark="a watermark", # adds a watermark (xù only!)
  wordwraparcs=on; # automatically wrap labels on arcs. Default: off

  # entities
  #
  # possible attributes
  #   label
  #   textcolor, textbgcolor, linecolor # as advertised
  #
  # these color the arcs departing from the entity:
  #   arctextcolor, arctextbgcolor, arclinecolor
  #

  cust [label="Customer"],
  shop,
  "delivery service",
  bank;

  # arcs
  #
  # attributes:
  #   label, textcolor, textbgcolor, linecolor # as advertised
  #   arcskip # arc starts here, ends the specified amount
  #           # of lines lower.
  #           # use e.g. arcskip="1" to end on the next line.
  #
  # arc types: ->, =>, =>>, >>, -x, :>,
  #            <->, <=>, <<=>>, <<>>, <:>
  #            --, ::, ..
  #            note, box, abox, rbox

  cust => shop [label="order(thing)"];
  shop -> "delivery service" [label="deliver(thing)"];
  "delivery service" =>> cust [label="thing"];
  cust >> "delivery service" [label="OK"];

  "delivery service" => shop [label="delivered!"];
  shop => cust [label="bill"];
  cust => bank [label="pay(bill, shop)"];
  bank => shop [label="€"];

  # inline expressions (xù only):
  # xù only  : alt, else, opt, break, critical,
  #            neg, strict, seq, assert, exc
  #            ref, consider, ignore, loop, par
  #
  # # e.g. to describe to alternatives :
  # shop alt bank [label="payment OK"]{
  #
  #   shop =>> bank [label="Thanks dude!"];
  #
  #   --- [label="payment NOK"]; # split alternatives with ---
  #
  #   shop =>> bank [label="that was not enough :-("];
  #   bank >> shop [label="Sorry. Bye."];
  #   shop rbox shop [label="payment pending process"];
  # };
}