本文件定义了从分支机构的交通系统传递到分支机构的广告插入系统的信息，用于广告插入时间表的通信，包括规定的唯一节目标识符。它指定了多层、特定于程序的插入所需的数据，以及数据通信的文件格式。 本文档仅描述带有SCTE 35[1]提示信息的数字广告插入。

This document defines the information that shall be passed from an Affiliate's Traffic System to an Affiliate's Ad Insertion System for communications of ad insertion schedules, including Unique Program Identifiers where specified. It specifies the required data for multi-tiered, Program-Specific Insertion, as well as the file format for the data communications. This document only describes digital ad insertion with SCTE 35 [1] cue messages.