Variable Names

• RULE: Must not exceed 31 letters for all global (e.g. COMMON, SUBROUTINE ..) names and all local names.

• RULE: Must avoid certain prefixes to avoid conflicts with current and future software. See section 2.4.

• RULE: Must be explicitly defined.

• Should follow the implicit type rule IJKLMN as the first letter are INTEGER. C is recommended for CHARACTER.

• RULE: Should not conflict with FORTRAN intrinsic functions, e.g. SIN or EXP.