CEA-2035/DVS-847标准化了元数据元素，用于描述家庭网络中设备的紧急警报事件，适用于涉及向家庭网络提供商业视频服务的应用。商业视频服务是特定服务提供商以直播或点播流形式提供的音频/视频内容的来源。其他标准定义了数字电缆接收设备（ANSI J-STD-042-A[2]）和IPTV终端设备（ATIS-0800012[1]）的紧急警报信号。家庭中能够访问商业视频服务的接收设备可能希望将此类内容放置在家庭网络上。CEA-2035/DVS-847定义了可由这些接收设备使用的元数据格式，用于向家庭网络中的客户端设备通知紧急警报信息，包括文本、音频和有关警报的具体细节（如发起者和事件代码、严重性等）。 )。某些类型的警报非常紧急，会触发客户端设备立即切换到该服务提供商提供的另一个频道，该频道是描述警报细节的实时音频/视频源（“细节频道”）。这里描述的元数据格式为此类情况提供了指向详细信息通道的指针。当在模式中定义为“异常通道”的通道上输出实时编程时，客户端设备将保持对该通道的调谐，以接收警报的详细信息。请注意，CEA-2035/DVS-847没有指定所需的接收器行为。这里标准化的元数据的使用指南（如数字生活网络联盟（DLNA）制定的指南）规定了这些要求。 CEA-2035/DVS-847的目的是标准化紧急警报元数据的传递格式、语法和语义，此处以XML模式和相关元素定义的形式指定。还要注意的是，CEA-2035/DVS-847没有描述在家庭网络中传递紧急警报元数据的传输协议和方法。系统定义的这些方面在其他指南和标准中有规定。例如，请参见DLNA关于此主题的指南。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。还应注意，服务提供商可能并不总是以可识别或可翻译为本文件中定义的家庭网络内重新分发所需格式的格式提供紧急警报信息。

CEA-2035/DVS-847 standardizes metadata elements describing emergency alert events to devices in a home network, for applications involving the delivery of Commercial Video Services into the home network. Commercial Video Services are sources of audio/video content provided as live or on-demand streams from a particular service provider. Other standards define emergency alert signaling for digital cable receiving devices (ANSI J-STD-042-A [2]) and for IPTV terminal devices (ATIS-0800012 [1]). Receiving devices in the home with access to Commercial Video Services may wish to place such content on a home network. CEA-2035/DVS-847 defines a metadata format usable by these receiving devices to notify client devices in the home network of emergency alert information including text, audio and specific details about the alert (such as originator and event code, severity, etc.). Some types of alerts are urgent enough that they trigger client devices to immediately switch to another channel offered by that service provider which is a source of live audio/video describing details of the alert (the "Details Channel"). The metadata format described here provides a pointer to the Details Channel for such cases. When outputting live programming on a channel defined in the schema as an "Exception Channel," client devices remain tuned to that channel to receive details of the alert. Note that CEA-2035/DVS-847 does not specify required receiver behavior. Guidelines for the use of the metadata standardized here, such as those developed by the Digital Living Network Alliance (DLNA), specify these requirements. The purpose of CEA-2035/DVS-847 is to standardize the delivery format and syntax and semantics of the emergency alert metadata, specified here in the form of an XML Schema and associated element definitions. Note also that CEA-2035/DVS-847 does not describe transport protocols and methods for the delivery of the emergency alert metadata in the home network. These aspects of the system definition are specified in other guidelines and standards. See for example DLNA guidelines on this topic. 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). It should further be noted that service providers may not always provide emergency alert information in a format that is identifiable or translatable to the format required for redistribution within the home network as defined within this document.