Module:Coxeter–Dynkin diagram

 -- module to turn a parameter list into a list of [[Coxeter–Dynkin diagram]] images.
 -- See the template documentation or any example for how it is used and works.
 localp={}

 functionp.CDD(frame)
 -- For calling from #invoke.
 localpframe=frame:getParent()
 localargs=pframe.args
 returnp._CDD(args)
 end

 functionp._CDD(args)
 -- For calling from other Lua modules.
 localbody='<span style="display:inline-block;">'-- create and start the output string
 forv,xinipairs(args)do-- process params, ignoring any names
 if(x~='')then-- check for null/empty names
 body=body.."[[File:CDel_"..x..".png|class=skin-invert-image|link=]]"-- write file for this parameter
 end
 end
 body=body.."</span>"-- finish output string
 returnbody-- return result
 end

 returnp