A continuation, broadly speaking, is a kind of "partially executed" flow, complete with its scope environment, that has been suspended during execution. This is a powerful concept that can "gear" the world of forwards-driven, declarative flow or logic design, and the "backwards-driven", request-oriented nature of the web. Continuations are not directly supported by RSF, but are available as part of its integration with Spring Web Flow. Language-level continuations are available as part of the RIFE continuations project.