This operator is represented by the keyword "implies". It is used to express a conditional relationship between two Boolean expressions. The expression "a implies b" is true if either a is false or b is true (or both). In other words, if a is true, then b must also be true for the entire expression to be true. If a is false, then the expression is automatically true regardless of the value of b. For example, "if it's raining (a), then I will bring an umbrella (b)" can be expressed as "a implies b" in OCL.