Hi,

Re-examining the Syntax Rules for the Boolean expressions I mentioned
earlier, I updated the syntax rules as follows:

Expressions of the form: (!AvB)^(Cv!D)

Syntax Rules:
a) operand = identifier
b) term = operand [ operator-->operand ... ]
c) sub-expression = term [ operator-->term ... ]
d) bracketed sub-expression = [ ! ... ] [ ( ... ] sub-expression [ ) ... ]
e) expression = [ ! ... ] sub-expression [ operator-->sub-expression ... ]

So, effectively, I will need five functions to implement the parser.

Edward