@startuml !unquoted function $app($id) !includeurl https://raw.githubusercontent.com/RicardoNiepel/C4-PlantUML/release/1-0/C4_Container.puml !$data={"participants" :[ {"id": "cm" ,"label": "customer master","desc": "manages customers"}, {"id": "tm" ,"label": "transaction manager","desc": "manages transactions"}, {"id": "am" ,"label": "account master","desc": "manages accounts"} ] } !foreach $part in $data.participants !if $part.id == $id !ifdef $INCLUDE_DESC !return "System(" + $part.id + ", '" + $part.label + "' , '" + $part.desc + "')" !else !return "System(" + $part.id + ", '" + $part.label + "')" !endif !endif !endfor !return "System(" + $id + ", 'enter label')" !endfunction !includeurl https://raw.githubusercontent.com/RicardoNiepel/C4-PlantUML/release/1-0/C4_Container.puml '%set_variable_value("$INCLUDE_DESC", $true) System(aa, 'aa system') System(bb, 'bb system', 'big system') $app("tm") @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art