本标准阐述了环境数据表示和交换的概念、语法和语义。它规定:1）表示环境数据的数据表示模型；2） 共同构成数据表示模型的数据类型和类的规范；以及3）支持使用数据表示模型存储和检索环境数据的应用程序接口。本标准还规定了拓扑、基于规则和其他约束，以确保在与环境数据交互时依赖自动生成的行为的应用程序可以使用适当的数据。

This standard addresses the concepts, syntax and semantics for the representation and interchange of environmental data. It specifies: 1) a data representation model for expressing environmental data; 2) specifications of the data types and classes that together constitute the data representation model; and 3) an application program interface that supports the storage and retrieval of environmental data using the data representation model. This Standard also specifies topological, rule-based, and other constraints that ensure appropriate data can be available for applications that rely on automatically generated behaviours when interacting with environmental data.