Implicit invocation is a term used by some authors for a style of software architecture in which a system is structured around event handling, using a form of callback. It is closely related to inversion of control and what is known informally as the Hollywood principle. Implicit invocation is the core technique behind the observer pattern. See also Spring Framework Qt Framework References External links An Introduction to Software Architecture by David Garlan and Mary Shaw An Introduction to Implicit Invocation Architectures by Benjamin Edwards Software architecture