BS EN 61334-4-42:1997

1 Scope
2 Normative references
3 Definitions
    3.1 Reference model definitions
    3.2 Naming and addressing definitions
    3.3 Service conventions definitions
    3.4 Application layer specific definitions
4 Abbreviations
5 Application layer concepts
    5.1 Introduction
    5.2 Application processes
    5.3 Application entities
    5.4 Application service elements
    5.5 Application-associations
    5.6 Application context
    5.7 Single association object
    5.8 Single association control function
    5.9 Names and directory functions
    5.10 Use of application-association
    5.11 Use of the data link services
    5.12 Application service element standards
    5.13 Abstract syntax definition
    5.14 Encoding rules
    5.15 DCP restrictions
    5.16 Registration requirements
6 Association control service element (ACSE)
    6.1 ACSE specific definitions
    6.2 Basic concepts
    6.3 Relationship with other ASEs
    6.4 Connectionless-mode ACSE service
    6.5 Connectionless-mode ACSE protocol
7 DLMS application entity
    7.1 Overview
    7.2 General structure
    7.3 Client-DLMS ASE
    7.4 Server-DLMS ASE
8 Elements of protocol procedure
    8.1 Descriptive convention
    8.2 Mapping to ACSE and data link services
    8.3 Entering and leaving the DLMS environment
    8.4 Operating in the DLMS environment
Annexes
A Default application context
B Bibliography
ZA Normative references to international publications
    with their corresponding European publications

DLMS (distributed line message specification) mapping on to a three layer stack covering mapping to underlying layers to enable future extensions.