OCL 2 Quick Reference Card

The Object Constraint Language (OCL) is a declarative language describing rules applying to Unified Modeling Language (UML) models and is part of the UML standard. OCL is a precise text language that provides constraint and object query expressions on any MOF model or meta-model that cannot otherwise be expressed by diagrammatic notation. OCL is a key component of the OMG standard for transforming models, the Queries / Views / Transformations (QVT) specification.

This OCL 2 quick reference card has been extensively checked and is compatible with the USE (UML-based Specification Environment) tool [see DOI=10.1016/j.scico.2007.01.013]