Expression Syntax

The right hand sides of transformation functions closely follow the syntax of Fortran 77 arithmetic expressions. The main differences (in addition to the less restrictive naming rules for variables) are:

• Transformation functions may be written in upper, lower or mixed case and there there is no limit on their length;

• Only the generic form of intrinsic functions is available, but some additional built-in functions are provided;

• The data types of variables and constants are interpreted differently (see below and Section ).

The following describes particular features of the expression syntax in more detail.