本文档定义了一个可供有线电视系统运营商使用的容器，用于将紧急警报（EA）元数据传送到消费者领域。该元数据旨在通过提供家庭中此类数字媒体服务器（DMS）所需的基于XML的预格式化EA数据，支持作为“商业视频服务”（CVS）服务器的有线电视机顶盒终端进入家庭网络。指定为ANSI J-STD-042-B[2]描述符形式的容器仅用于ANSI J-STD-042-B[2]中定义的紧急警报信号消息内的运输。描述符中携带的元数据包括符合ANSI J-STD-070[1]的元数据元素，这是家庭网络中XML格式EA数据的标准传递格式。 本标准的用户应意识到，EAS是一个受监管的主题，目前正由联邦应急管理局（FEMA）考虑。

This document defines a container usable by cable system operators for the delivery of Emergency Alert (EA) metadata into the consumer domain. This metadata is designed to support cable set-top terminals which function as servers of "commercial video services" (CVS) into the home network, by providing preformatted XML-based EA data required by such Digital Media Servers (DMS) in the home. The container, specified as being in the form of an ANSI J-STD-042-B [2] descriptor, is defined only for carriage within the emergency alert signaling message defined in ANSI J-STD-042-B [2]. The metadata carried in the descriptor includes metadata elements conforming to ANSI J-STD-070 [1], which is the standard delivery format for XML-formatted EA data in the home network. Users of this standard should be aware that EAS is a topic which is subject to regulation and is currently under consideration by the Federal Emergency Management Agency (FEMA).