ISO/IEC 21000-7:20 07规定了可用于辅助数字项目(即数字项目声明和声明引用的资源)的适配的工具的语法和语义。用户可以使用这些工具来满足传输、存储和消费限制，以及服务质量管理。 ISO/IEC 21000-7:20 07规定了描述以下内容的工具: 用户特征、终端能力、网络特征和自然环境特征； 二进制媒体资源的高级语法、媒体资源和XML流指令以及属性样式表； 服务质量约束、满足这些约束的可行适配操作和由适配产生的相关媒体资源质量之间的关系:适应的限制和优化约束； 用于将适配决策与实际媒体资源适配引擎链接的装置； 元数据适配提示信息； 数字项目的配置状态信息； 自适应引擎的配置所需的信息；和 允许的变更和变更限制。 ISO/IEC 21000-7:20 07没有指定自适应引擎本身。

ISO/IEC 21000-7:2007 specifies the syntax and semantics of tools that may be used to assist the adaptation of Digital Items, i.e. the Digital Item Declaration and resources referenced by the declaration. Users can use the tools to satisfy transmission, storage and consumption constraints, as well as Quality of Service management. ISO/IEC 21000-7:2007 specifies tools to describe:

• user characteristics, terminal capabilities, network characteristics and natural environment characteristics;
• the high-level syntax of a binary media resource, media resource and XML streaming instructions, and properties style sheet;
• the relationship between Quality of Service constraints, feasible adaptation operations satisfying these constraints and associated media resource qualities that result from adaptation:
• limitation and optimization constraints on adaptations;
• means for linking adaptation decisions with actual media resource adaptation engines;
• metadata adaptation hint information;
• configuration-state information of a Digital Item;
• information required for the configuration of an adaptation engine; and
• permitted changes and change constraints.

ISO/IEC 21000-7:2007 does not specify the adaptation engines themselves.