Parameter options are assigned a value by specifying the option name followed by its parameters. Changing the value of a parameter option does not affect any Boolean option. This is true whether SET, RESET, or POP is stipulated. The INCLUDE and SYMBOLIC options cannot appear with other options; they must appear alone on a separate option control card image.

An option expression can be used to assign a value to system options and user options. Option expressions yield a value of either true or false. They are formed by combining system options, user options, and constants using logical operators. Operators are evaluated in the following order of precedence:

When operators have the same precedence, the operations are performed in order from left to right. Parentheses can be used to override the usual order of evaluation.