lagskal
Lagskal is a term used in some discussions of layered systems to denote the outer protective boundary or enclosing shell of a multi-layer construct. The word is a compound of lag (layer) and skal (shell) in Scandinavian languages, and it is not part of a formal vocabulary in most technical disciplines. As a result, its precise definition and scope vary between fields.
In software engineering, lagskal is sometimes used to refer to the surface layer that exposes functionality
Because lagskal is not standardized, authors typically define their intended meaning at first use. When introducing
See also: shell, outer layer, envelope, boundary layer, multi-layer system.