本标准描述了AT附件的体系结构模型。架构模型的目的是 为协调ATA标准提供共同基础，并定义ATA的这些方面 独立于特定技术且对所有实现通用的系统行为。

This standard describes the AT Attachment Architectural Model. The purpose of the architecture model is to provide a common basis for the coordination of ATA standards and to define those aspects of ATA system behavior that are independent of a particular technology and common to all implementations.