本标准将包含两个级别的接口，定义距离小于10m的操作。物理层将规定连接器和卡的电气、机械和热特性。逻辑层将描述地址空间、数据传输协议、缓存一致性机制、同步原语、控制和状态寄存器，以及初始化和错误恢复设施。

This standard will encompass two levels of interface, defining operation over distances less than 10 m. The physical layer will specify electrical, mechanical, and thermal characteristics of connectors and cards. The logical level will describe the address space, data transfer protocols, cache coherence mechanisms, synchronization primitives, control and status registers, and initialization and error recovery facilities.