OCL (Object Constraint Language)

Object Constraint Language (OCL) is a formal language used to describe rules and constraints for object-oriented models, particularly in software design. It allows developers to specify how data should behave, ensuring it remains consistent and valid within a system. OCL is often used alongside Unified Modeling Language (UML) diagrams to define invariants, preconditions, and postconditions for the objects and their relationships. By using OCL, developers can articulate expectations clearly, helping to prevent errors and enhance the reliability of software applications.