All Manuals > Common Lisp Interface Manager 2.0 User's Guide > Chapter 19 Ports, Grafts, and Mirrored Sheets

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19.1 Introduction

A sheet hierarchy must be attached to a display server so as to permit input and output. This is managed by the use of objects known as ports and grafts .


Common Lisp Interface Manager 2.0 User's Guide - 7 Aug 2017

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