IEC 81714-2:2006
产品技术文档中使用的图形符号的设计 第2部分:计算机可感知形式的图形符号规范,包括参考库的图形符号及其互换要求
Design of graphical symbols for use in the technical documentation of products - Part 2: Specification for graphical symbols in a computer sensible form, including graphical symbols for a reference library, and requirements for their interchange