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.