O'Reilly logo

Unified Modeling Language Reference Manual, The, Second Edition by Grady Booch, Ivar Jacobson, James Rumbaugh

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

instance

An individual entity with its own identity and value. A classifier specifies the form and behavior of a set of instances with similar properties. An instance has identity and values that are consistent with the specification in the classifier. Instances appear in models as instance specifications.

See also classifier, identity, instance specification, link, object.

Semantics

The UML specification document does not include a clear specification of the run-time environment that models describe. Without such a specification, models lack meaning. The following discussion probably should have been included in the specification. It represents the commonly accepted background without which models make little sense.

An instance is an entity ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required