This part of IEC 61987 provides
operating list of properties (OLOP) for the description of the operating parameters and the collection of requirements for level measuring equipment, and
device lists of properties (DLOPs) for the description of a range of level measuring equipment types.
The structures of the OLOP and the DLOPs correspond to the general structures defined in IEC 61987-11 and agree with the fundamentals for the construction of LOPs defined in IEC 61987-10.
Aspects other than the OLOP, needed in different electronic data exchange processes described in IEC 61987-10, will be published in IEC 61987-921.
The locations of the libraries of properties and of blocks used in the LOPs concerned are listed in the Annexes C and D.