4.4.2 The GLOBALS Data Cards

The GLOBALS indicator card is used to announce the assignment of general parameter values. the syntax for data cards following the indicator card is given in Figure 4.4.

Figure 4.4: Possible data cards for GLOBALS

The one or two character string in field 1 specifies the type of assignment that is to be made from the card. Possible values for the first character of the string are:

A

This card announces that an auxiliary parameter is to be assigned a value. The string p-name in field 2 gives the name of the auxiliary parameter that is to be defined; this name must be a valid Fortran name, see Section 3.1.2, and must have been previously defined in the TEMPORARIES section. The string in field 7 is an arithmetic expression. The assignment

$$\mbox{auxiliary variable named in field~2} \leftarrow \mbox{field~7}$$

is made, where again $\leftarrow$ means ``is given the value''; any variable mentioned in the arithmetic expression must either be reserved (see Section 4.4.1), or have been defined in the TEMPORARIES section. If in this latter case, the variable is integer or real, it must have been allocated a value itself on a previous GLOBALS data card.

I

This card announces that an auxiliary parameter is to be assigned a value whenever a second logical auxiliary parameter has the value .TRUE. The string p-name in field 3 gives the name of the auxiliary parameter that is to be defined; this name must be a valid Fortran name, see Section 3.1.2, and must have been previously defined in the TEMPORARIES section. The string in field 7 is an arithmetic expression. The assignment

$$\mbox{auxiliary variable named in field~3} \leftarrow \mbox{field~7}$$

will be made if and only if the logical auxiliary parameter l-name specified in field 2 has the value .TRUE.; the logical parameter must have been previously defined in the TEMPORARIES section and allocated a value in the GLOBALS section. The arithmetic expression must obey the rules set out in the A section above.

E

This card announces that an auxiliary parameter is to be assigned a value whenever a second logical auxiliary parameter has the value .FALSE. The string p-name in field 3 gives the name of the auxiliary parameter that is to be defined; this name must be a valid Fortran name, see Section 3.1.2, and must have been previously defined in the TEMPORARIES section. The string in field 7 is an arithmetic expression. The assignment

$$\mbox{auxiliary variable named in field~3} \leftarrow \mbox{field~7}$$

will be made if and only if the logical auxiliary parameter, l-name, specified in field 2 has the value .FALSE.; the logical parameter must have been previously defined in the TEMPORARIES section and allocated a value in the GLOBALS section. The arithmetic expression must obey the rules set out in the A section above.

The data started on an A, I and E card may be continued on a card whose first field contains an A+, I+ or E+ respectively. Such cards contain an arithmetic expression in field 7 and no further data; the arithmetic expression must obey the rules set out in the A section above. At most nineteen continuations of a single assignment are allowed.

The GLOBALS section is intended for the definition of auxiliary variables which occur in more than one element type. If an auxiliary variable occurs in a single element type, it may be defined in the INDIVIDUALS section (see Section 4.4.3).