ISO 21090:2011 -提供一组数据类型定义，用于表示和交换医疗环境中常见的基本概念，以支持医疗环境中的信息交换； -指定适合在许多健康相关信息环境中使用的健康相关数据类型的集合； -使用ISO/IEC 11404中定义的术语、符号和数据类型声明这些数据类型的语义，从而扩展该标准中定义的数据类型集； -使用统一建模语言（UML）2.0版中定义的术语、符号和类型，提供相同数据类型的UML定义； -指定基于XML（可扩展标记语言）的数据类型表示。 支持该范围的要求反映了主要从HL7版本3和ISO/IEC 11404、CEN/TS 14796、ISO 13606（所有部分）以及过去ISO关于医疗数据类型的工作中收集的各种要求。 ISO 21090:2011可以为卫生信息系统的内部设计提供实用和有用的贡献，但主要用于定义外部接口或消息以支持它们之间的通信。

ISO 21090:2011 - provides a set of datatype definitions for representing and exchanging basic concepts that are commonly encountered in healthcare environments in support of information exchange in the healthcare environment; - specifies a collection of healthcare-related datatypes suitable for use in a number of health-related information environments; - declares the semantics of these datatypes using the terminology, notations and datatypes defined in ISO/IEC 11404, thus extending the set of datatypes defined in that standard; - provides UML definitions of the same datatypes using the terminology, notation and types defined in Unified Modelling Language (UML) version 2.0; - specifies an XML (Extensible Mark-up Language) based representation of the datatypes. The requirements which underpin the scope reflect a mix of requirements gathered primarily from HL7 Version 3 and ISO/IEC 11404, and also from CEN/TS 14796, ISO 13606 (all parts) and past ISO work on healthcare datatypes. ISO 21090:2011 can offer a practical and useful contribution to the internal design of health information systems, but is primarily intended to be used when defining external interfaces or messages to support communication between them.