DCA Components

[T]he ... DCA paradigm ... explicitly describes high-level system features. The object space is partitioned into Components, where a component is an encapsulation of a number of domain objects. A component is characterized by its provided and required operations; its internal structure is invisible from its outside.

http://heim.ifi.uio.no/~trygver/2006/09-JavaZone/mvc-dca.pdf - Contrasts DCA with MVC