The DUMMY statement has the form
DUMMY name,name,name...
and indicates that the variables named are not real variables, but instead are to be used in building up the description of a new type.
Note that in EQUIVALENCE and INTERLEAVE statements, dummy variables may only be linked to other dummy variables. Note also that the dummy variables declared with a DUMMY statement are not to be confused with other types of dummy variables in FORTRAN, such as in a DEFINE or FLOW statement.