Function Key

Function keys are always formed according to the following syntax:

operation|opType1|opType2|opType3|resType

The individual elements of the key carry the following meanings:

• operation – a character string that unambiguously identifies the corresponding operation.
• opType – a character string that unambiguously describes the type of operands necessary.
• resType – a character string that unambiguously describes the type of result of the operation.