• 1. 文件描述表: file description table | FDT-File Description Table
• 2. 文件描述符表: File Descriptor Table
• 3. 预装的描述文件列表: Provisioning Profile List

• 1.设备抽象层为上层应用程序提供了一套标准的、与设备无关的通信接口，并且通过文件描述表、设备描述表和驱动描述表建立了从通信接口到设备驱动的映射。
  The device Abstract Layer provides a set of standard communication interface functions unrelated with specific device, which is mapped to device drivers by file table, device table and driver table.
  dict.yoduao.com
• 2.这里不需要让每个代理维护它自己的文件描述符表。
  There is no need to have each agent maintain its own file descriptor table.
  dict.yoduao.com
• 3.表1描述了这些文件。
  Table 1 describes these files.
  dict.yoduao.com

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