Conditional Alternatives

Alternatives selected by the contents of some previous field rather than by the contents of the alternative field itself are indicated by an extension of the conditional field notation. For example:

     SM := W : F1 + CPAIR + [W = C1 > CPAIR / C2 > PPAIRS /

The determining field occurs at the beginning of the conditional alternative and each alternative then includes its value for the determining field and the alternative field then present.