This Recommendation describes the common upper layer requirements above and beyond those specified in Recommendation X.637 to support ROSE-based profiles which do not use the services of the RTSE. These common elements are specified by reference to the OSI connection-mode Recommendations for the ROSE protocol, the ACSE protocol, the Presentation layer protocol and the Session layer protocol. This is one of a series of Recommendations to support the minimal OSI functions in the upper layers. It is technically aligned with ISO/IEC ISP 11188-2.