This appendix contains sequence diagrams showing the relationship between the API service requests issued at an endpoint and service primitives issued to or by the transport provider. Overview Describes the labelling and illustration techniques used in the diagrams.
Diagrams Includes the time-sequence diagrams.
The transport provider is shown as a single entity, although, in actuality, there is a local and remote entity between which the protocol exchanges take place. The vertical lines delineating the transport interface represent the endpoint from the perspective of the transport user and transport provider. An asynchronous event that causes an exit routine to be scheduled is labeled an indication. Asynchronous mode applies when service requests are issued asynchronous with normal processing. This mode requires use of exit routines, and requests are often issued under control of the IRB that runs the exit routine.