本规范包含使用EN 14908-1及其相关数据传输媒体规范以便可互操作的方式交换数据和控制信息所需的所有信息。 本规范规定了一套最合适的规则。考虑到系统中遵守规则，它不排除提供的扩展服务。标准的目的是允许扩展服务共存并定义这些服务的功能范围，包括这些服务的内部设备文档的格式。本规范外部的服务，只要它们是系统的附着者是允许的，但不一定可以与任何其他设备互操作，并且不对设备的功能至关重要。 本标准的某些方面在其他文件中定义。这些文件在相关的情况下引用。在引用标准与本文件冲突的情况下，以本文档为准

This specification contains all the information necessary to facilitate the exchange of data and control information in an interoperable fashion using EN 14908-1 and its associated data-transport media specifications. This specification establishes a minimal set of rules for compliance. It does not rule-out extended services to be provided, given that the rules are adhered-to within the system. It is the intention of the standard to permit extended services to coexist and defines the bounds in which those services function, including the format for internal device-documentation of those services. Services outside purvey of this specification so long as they are adherents of the system are permitted but will not necessarily be interoperable with any other devices and shall not be essential for the functioning of the device. Certain aspects of this standard are defined in other documents. These documents are referenced where relevant. In the case where a referenced standard conflicts with this document, this document will prevail.