aggregation        “parts” to build up anything... Objects representing components that are included in anything.

association        between object instances, represented by links of the same type.

attribute        a named entity describing a feature of the object.

class        group of objects with same features, behavior and relations with other objects.

classification        grouping of objects with same data structures and behavior.

encapsulation        defining features of an object that should not be available to others, from outside the object.

inheritance        sharing of properties and behavior between classes.

instance        object described by a class.

link        instance of an association.

object        instance of a class.

operation        function or calculation performed on an object.

process        collection of functions for transformation of values.

role        describes one end of an association.