A mechanism that describes behavioral and structural features. Classifiers include interfaces, classes and datatypes and components.

A classifier is a model element that describes structural features and behavior. Some classifiers include: class, actor, component, data type, interface, node, and use case.

a model element that describes behavioral feature s and/or structural feature s

a namespace whose members can include features

Module that matches features of a recording against the prototypes of one or more learned persons. Also calculates the prototypes from training data.

A UML element that has Attributes and Operations. Specifically, Actors, Classes, and Interfaces.

A classifier is a category of UML elements that have some common features, such as attributes or methods.