IEC 81346的本部分建立了具有定义对象类别及其相关字母代码的分类方案，主要用于参考名称和通用类型的名称。 分类方案适用于所有技术学科和所有行业分支的对象。 本文件为横向出版物，也供技术委员会根据IEC指南108中规定的原则编制与参考名称相关的出版物时使用。交叉引用:IEC 60898EN 81346-1:2009IEC 81346-1:2009ISO 22274:2013ISO 12006- 2:2015ISO/IEC 11179-1:2015ISO 704:2009ISO 1087-1:2000EN ISO 12006-2EN 60898（系列）IEC 60898（系列）取代BS EN 81346-2:2009，该标准仍然有效。购买本文件时，所有当前可用的修订均包含在购买本文件中。

This part of IEC 81346 establishes classification schemes with defined object classes and their associated letter codes, and is primarily intended for use in reference designations and for designation of generic types. The classification schemes are applicable for objects in all technical disciplines and all branches of industry. This document is a horizontal publication also intended for use by technical committees in preparation of publications related to reference designations in accordance with the principles laid down in IEC Guide 108.Cross References:IEC 60898EN 81346-1:2009IEC 81346-1:2009ISO 22274:2013ISO 12006-2:2015ISO/IEC 11179-1:2015ISO 704:2009ISO 1087-1:2000EN ISO 12006-2EN 60898 (series)IEC 60898 (series)Replaces BS EN 81346-2:2009 which remains currentAll current amendments available at time of purchase are included with the purchase of this document.