root:
             creates   file:./
             creates   file:plan.py
             creates   step:./plan.py

file:./
               state = STATIC
          created by   root:
            supplies   (file:inp.txt)
            supplies   (step:./work.py)
            supplies   file:out.txt
            supplies   file:plan.py
            supplies   file:work.py
            supplies   step:./plan.py
            supplies   step:cp -aT inp.txt out.txt

file:plan.py
               state = STATIC
          created by   root:
            consumes   file:./
            supplies   step:./plan.py

step:./plan.py
               state = SUCCEEDED
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   file:work.py
             creates   step:cp -aT inp.txt out.txt

file:work.py
               state = STATIC
          created by   step:./plan.py
            consumes   file:./
            supplies   (step:./work.py)

(step:./work.py)
               state = SUCCEEDED
            consumes   file:./
            consumes   file:work.py
             creates   (dg:inp.*)

step:cp -aT inp.txt out.txt
               state = SUCCEEDED
          created by   step:./plan.py
            consumes   (file:inp.txt)
            consumes   file:./
             creates   file:out.txt
            supplies   file:out.txt

(file:inp.txt)
               state = STATIC
          created by   (dg:inp.*)
            consumes   file:./
            supplies   step:cp -aT inp.txt out.txt

file:out.txt
               state = BUILT
          created by   step:cp -aT inp.txt out.txt
            consumes   file:./
            consumes   step:cp -aT inp.txt out.txt

(dg:inp.*)
          created by   (step:./work.py)
             creates   (file:inp.txt)
