As before, the user must prepare an input file, the SGIF (Standard Group type Input Format) file, consisting of indicator and data cards. The former contain a simple keyword to specify the type of data that follows. Possible indicator cards are given in Figure 5.1.
Indicator cards must appear in the order shown. The cards TEMPORARIES, GLOBALS and INDIVIDUALS are optional.
The data cards are of a single kind, using four fields, fields 1, 2, 3 and 7, exactly as described in Section 4.2.