Information technology — Computer graphics — Interfacing techniques for dialogues with graphical devices (CGI) — Functional specification — Part 5: Input and echoing
信息技术——计算机图形学——与图形设备(CGI)对话的接口技术——功能规范第5部分:输入和回音
Defines those functions of the interface concerned with obtaining graphical and non-graphical input from a virtual device. Defines also functions to support echoing of input operations on separate virtual devices.