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The Application Exchange Core
RFC 3340

Document type: RFC - Historic (July 2002; No errata)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 3340 (Historic)
Responsible AD: Ned Freed
IESG Note: Responsible: Finished
Send notices to: <presnick@qualcomm.com>

Network Working Group                                            M. Rose
Request for Comments: 3340                  Dover Beach Consulting, Inc.
Category: Standards Track                                       G. Klyne
                                                  Clearswift Corporation
                                                              D. Crocker
                                             Brandenburg InternetWorking
                                                               July 2002

                     The Application Exchange Core

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This memo describes Application Exchange (APEX) Core, an extensible,
   asynchronous message relaying service for application layer programs.

Table of Contents

   1.      Introduction . . . . . . . . . . . . . . . . . . . . . . .  2
   1.1     Overview . . . . . . . . . . . . . . . . . . . . . . . . .  3
   1.2     Architecture at a Glance . . . . . . . . . . . . . . . . .  4
   2.      Service Principles . . . . . . . . . . . . . . . . . . . .  5
   2.1     Modes of Operation . . . . . . . . . . . . . . . . . . . .  5
   2.2     Naming of Entities . . . . . . . . . . . . . . . . . . . .  6
   2.2.1   Comparing Endpoints  . . . . . . . . . . . . . . . . . . .  7
   3.      Service Provisioning . . . . . . . . . . . . . . . . . . .  7
   3.1     Connection Establishment . . . . . . . . . . . . . . . . .  7
   3.2     Authentication . . . . . . . . . . . . . . . . . . . . . .  8
   3.3     Authorization  . . . . . . . . . . . . . . . . . . . . . .  8
   3.4     Confidentiality  . . . . . . . . . . . . . . . . . . . . .  8
   3.5     Relaying Integrity . . . . . . . . . . . . . . . . . . . .  8
   3.6     Traffic Analysis . . . . . . . . . . . . . . . . . . . . .  9
   4.      The APEX . . . . . . . . . . . . . . . . . . . . . . . . .  9
   4.1     Use of XML and MIME  . . . . . . . . . . . . . . . . . . .  9
   4.2     Profile Identification and Initialization  . . . . . . . . 10
   4.3     Message Syntax . . . . . . . . . . . . . . . . . . . . . . 11

Rose, et. al.               Standards Track                     [Page 1]
RFC 3340             The Application Exchange Core             July 2002

   4.4     Message Semantics  . . . . . . . . . . . . . . . . . . . . 11
   4.4.1   The Attach Operation . . . . . . . . . . . . . . . . . . . 11
   4.4.2   The Bind Operation . . . . . . . . . . . . . . . . . . . . 13
   4.4.3   The Terminate Operation  . . . . . . . . . . . . . . . . . 14
   4.4.4   The Data Operation . . . . . . . . . . . . . . . . . . . . 15
   4.4.4.1 Relay Processing of Data . . . . . . . . . . . . . . . . . 17
   4.4.4.2 Application Processing of Data . . . . . . . . . . . . . . 18
   4.5     APEX Access Policies . . . . . . . . . . . . . . . . . . . 19
   4.5.1   Access Policies in the Endpoint-Relay Mode . . . . . . . . 19
   4.5.2   Access Policies in the Relay-Relay Mode  . . . . . . . . . 20
   5.      APEX Options . . . . . . . . . . . . . . . . . . . . . . . 20
   5.1     The statusRequest Option . . . . . . . . . . . . . . . . . 22
   6.      APEX Services  . . . . . . . . . . . . . . . . . . . . . . 26
   6.1     Use of the APEX Core DTD . . . . . . . . . . . . . . . . . 27
   6.1.1   Transaction-Identifiers  . . . . . . . . . . . . . . . . . 27
   6.1.2   The Reply Element  . . . . . . . . . . . . . . . . . . . . 28
   6.2     The Report Service . . . . . . . . . . . . . . . . . . . . 28
   7.      Registration Templates . . . . . . . . . . . . . . . . . . 29
   7.1     APEX Option Registration Template  . . . . . . . . . . . . 29
   7.2     APEX Service Registration Template . . . . . . . . . . . . 29
   7.3     APEX Endpoint Application Registration Template  . . . . . 30
   8.      Initial Registrations  . . . . . . . . . . . . . . . . . . 30
   8.1     Registration: The APEX Profile . . . . . . . . . . . . . . 30
   8.2     Registration: The System (Well-Known) TCP port number for
           apex-mesh  . . . . . . . . . . . . . . . . . . . . . . . . 31
   8.3     Registration: The System (Well-Known) TCP port number for
           apex-edge  . . . . . . . . . . . . . . . . . . . . . . . . 31
   8.4     Registration: The statusRequest Option . . . . . . . . . . 31
   8.5     Registration: The Report Service . . . . . . . . . . . . . 32
   9.      DTDs . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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