Industrial-process measurement and control - Data structures and elements in process equipment catalogues - Part 24-1: Lists of Properties (LOPs) of positioners and I/P converters for electronic data exchange
IEC 61987-24-1:2015 provides Operating Lists of Properties (OLOPs) for the description of the operating parameters and the collection of requirements for valve/actuator accessories, that can be used for every valve/actuator accessory, Device Lists of Properties (DLOPs) for positioners and I/P converters.