Upper boundary of Adaptation Layers

Hello Folks,

In my current understanding of the SIGTRAN:

- SUA and M3UA RFCs define the primitives of the adaptation layers
towards their users in Section "1.6.1.  Definition of the upper
boundary".
  SUA and M3UA RFCs simply refer to ITU-T and ANSI standards for the
complete definition of the primitives towards the users, therefore
SIGTRAN supports existing
  SCCP/MTP users without them being aware of the fact that SIGTRAN is
used for the transport of messages.
  SIGTRAN concepts and the corresponding entities/objects like AS, RK,
RC, IPSP, ASP, and SGP are not part of the currently standardized
upper boundary of M3UA (SUA).
  Thus today's SIGTRAN users do not know anything about those concepts.

Can you please confirm this view or tell me if I'm mislead by my
interpretation ?

Is their any attempt in SIGTRAN WG to define an extended upper
boundary for xxUA that gives the option of managing entities like AS,
RK, RC, IPSP, ASP, and SGP to xxUA users and what are the enhanced
services expected from adaptation layers ?

Thank you in advance

--
Ilie