The law and principle of dynamic correspondence are used to analyze th
e laws governing the reaction of a system in the form of functional ac
tion-reaction relations for a wide range of nonequilibrium conditions.
The dynamic correspondence is reflected by a dynamic object process c
lassifier which is used to indicate possible new highly nonequilibrium
effects. The laws of reaction are used to give a simple description o
f a structural transition for a wide range of systems. (C) 1998 Americ
an Institute of Physics.