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==== [[Understanding OCL with reference to SQL]] ==== | ==== [[Understanding OCL with reference to SQL]] ==== | ||
'''OCL by example''' | '''[[OCL by example]]''' | ||
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[[Category:Beginner]] | [[Category:Beginner]] |
Revision as of 16:41, 28 November 2018
The Object Constraint Language (OCL) is a declarative language for describing rules that apply to Unified Modeling Language (UML) models developed at IBM and now part of the UML standard. Initially, OCL was only a formal specification language extension to UML. OCL may now be used with any Meta-Object Facility (MOF) Object Management Group (OMG) meta-model, including UML.[2] The Object Constraint Language 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 new OMG standard recommendation for transforming models, the Queries/Views/Transformations (QVT) specification.