ISO 20106:2015 defines, in an abstract manner, the COM in terms of:

a) the operations necessary to provide the service;

b) the parameter data associated with each operation;

c) the required behaviour of each operation;

d) the use of the model.

It does not specify:

a) individual implementations or products;

b) the implementation of entities or interfaces within real systems;

c) the methods or technologies required for communications.