Nodes of different colours represent the following:
Solid arrows point from a file to a file which it depends on. A file is dependent upon another if the latter must be compiled before the former can be.
program volatile_doctest use vecfor_RPP type(vector) :: pt(1:2) pt(1) = ex pt(2) = ey print "(F3.1)", pt(1).dot.pt(2) endprogram volatile_doctest