Object Constraint Language

Object Constraint Language (OCL) is a formal language used to define rules and constraints for model elements in software development, particularly within UML (Unified Modeling Language) diagrams. It allows developers to express specific conditions that must be met—such as data integrity rules—without altering the underlying models. OCL is not a programming language; instead, it provides a way to specify constraints clearly and concisely, ensuring that software models behave as intended and adhere to predefined requirements. This helps in validating the design and maintaining consistency throughout the development process.