This is a tool that will draw a grpah of the references from one step instance to another. It can do this without having access to the schema to which the file conforms.
Source Code: browse GIT repository
This tool uses a CLIM graphical user interface that must be built using one of the commercial Lisp environments: LispWorks, Allegro CL. LispWorks is known to work.
You should now find a stepgraph file in the current directory.