本文件建立了系统结构和参考名称制定的规则，并为建筑工程和建筑服务领域的系统提供了类别。本文件还规定了物体的分类和相应的字母代码，用于物体发生的参考命名。 本文件不适用于制造商或与系统相关的个人名称（如库存编号或序列号）或产品类型（如商品编号或零件号）。

This document establishes rules for structuring of systems and the formulation of reference designations and provides classes for systems in the field of construction works and building services. This document also specifies a classification of objects and corresponding letter codes for use in reference designations of object occurences. This document is not intended for manufacturers or system-related designations of individuals (e.g. inventory number or serial number) or for product types (e.g. article number or parts number).