logic variable

<programming>

A variable in a logic programming language which is initially undefined ("unbound") but may get bound to a value or another logic variable during unification of the containing clause with the current goal. The value to which it is bound may contain other variables which may themselves be bound or unbound.

For example, when unifying the clause 

 sad(X) :- computer(X, ibmpc).
with the goal 

 sad(billgates).
the variable X will become bound to the atom "billgates" yielding the new subgoal "computer(billgates, ibmpc)".

Last updated: 1995-03-14

Nearby terms:

logic programming ♦ Logic Replacement Technology ♦ logic variable ♦ LOGIN ♦ log in

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