An event that is generated when one or more attributes or associations change value according to an expression.
The element specified in one of the UML diagrams for which the OCL expression is defined.
The text or symbol that defines the relationship between an OCL expression and the element in the part of the model that is specified by UML diagrams.
An instance of the contextual type of an OCL expression.
The type of the object for which an OCL expression will be evaluated.
A description of the services that are provided by an object using pre- and postconditions.
A rule that specifies the value of a derived element.