This document describes the Common Lisp User Interface Environment (CLUE), a
portable system for user interface programming in Common Lisp.
CLUE is based on the X Window System[#x-window-system##1###] and extends X to
provide an architectural model for the construction of interactive
Lisp applications.
In this model, a user interface is composed of a set of abstract interface
objects. CLUE defines the basic programmer interfaces for defining
interface object types, creating interface
objects, and using them to control the dialog between the application and its
human user.
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