This Recommendation | International Standard defines in an abstract way the externally visible service provided by the OSI Session Layer in terms of:
a) the primitive actions and events of the service;
b) the parameter data associated with each primitive action and event;
c) the relationship between, and the valid sequence of these actions and events.
The service defined in this Recommendation | International Standard is that which is provided by the OSI session protocol (in conjunction with the transport service) and which may be used by the OSI presentation protocol.
This Recommendation | International Standard does not specify individual implementations or products, nor does it constrain the implementation of entities and interfaces within a computer system. There is, therefore, no conformance to this Recommendation | International Standard.
The text pertaining to the symmetric synchronization functional unit is not applicable to the support of ITU-T applications.