The GROUP TYPE indicator card is used to announce the data for the different types of nontrivial groups which are to be used. The names of the group-type variable and, optionally, of group parameters for each group type are specified in this section. The syntax for data cards following the indicator card is given in Figure 3.2.17.
The string in field 1 may be either GV or GP. This indicates whether the name of a group-type variable (GV) or one or more group parameters (GP) are to be specified on the given data card. The data for a particular group type must be specified on consecutive data cards. The string gtype-name in data field 2 gives the name of a nontrivial group type and may be up to ten characters long. If data field 1 holds GV, the string gv-nam in data field 3 then gives the name of the group-type variable for this group type. This string may be up to 6 characters long. This string must be a valid Fortran name (see Section 3.1.2). The names of the variables for different group types may be the same. Alternatively, if data field 1 holds GP, the strings gp-nam in data fields 3 and (optionally) 5 give the names of parameters for the group type. These strings must again be valid Fortran names. The names of parameters for different group types may be the same; the names of the group-type variable and parameters (if the latter appear) for a specific group type must all be different.