本推荐规程提供了唯一标识原则和定义的单一来源，以及与部件功能标识符、实施说明和系统描述有关的相关推荐规程，构成了一个名为能源行业标识系统（EIIS）的概念，用于唯一标识系统、结构和部件，以及核电站和化石燃料发电厂项目（发电站）及相关设施的组件。水电和其他类型的发电厂项目不包括在本期中。

This recommended practice provides a single source of unique identification principles and definitions which, along with related recommended practices concerning component function identifiers, implementation instructions, and system descriptions, make up a concept, entitled the Energy Industry Identification System (EIIS), for uniquely identifying systems, structures, and components of nuclear and fossil fueled power plant projects (electric power generating stations) and related facilities. Hydro and other types of power plant projects are not included in this issue.