digraph dataFlow {

nodesep=1.0 // increases the separation between nodes

node [color=Red,fontname=Courier]
edge [color=Blue, style=dashed] //setup options

TopLevel->{ NeutralCLFile Editor }

{rank=same; NeutralCLFile Editor} //they have the same rank
NeutralCLFile -> Editor
Editor -> NeutralCLFile

NeutralCLFile -> PostP

PostP -> MachineSpecificFile
}