composite services to RPC users, that is,
application processes. Specifically, the outmost
component is called RPC AS0 while the internal
components are the Signature ASE, the RPC ASOassociation
Service Element and the CF. The
Signature ASE provides application specific RPC
invocation services; the RPC ASO-association
Service Element manages AS0 associations to
support remote procedure calls and their callbacks;
and the CF coordinates the information flow in and
out of the RPC ASQ and between the internal ASEs
and is rksponsible for mapping between the services
provided and requested by these components. Each
internal component has to carry out a set of actions,
for example, building an application protocol data
unit (APDU), in order to provide the composite
remote procedure call services to RPC users.