DIN EN 61987-21:2016
工業過程測量和控制.過程設備目錄中的數據結構和元素.第21部分:用于電子數據交換的自動閥門的屬性列表(LOP).通用結構(IEC 61987-21-2015).德文版本EN 61987-21-2016
Industrial-process measurement and control - Data structures and elements in process equipment catalogues - Part 21: List of Properties (LOP) of automated valves for electronic data exchange - Generic structures (IEC 61987-21:2015); German version EN 6198