BS ISO/IEC 9545:1994

Foreword
Introduction
1. Scope
2. Normative references
3. Definitions
4. Abbreviations
5. Application Layer Concepts
5.1 Introduction
5.2 Fundamental concepts
5.3 Application-Processes
5.4 Application-Entities
5.5 Application-Service Elements
5.6 Application-Associations
5.7 Application-Context
5.8 Single Association Object
5.9 Single Association Control Function
5.10 Multiple Association Co-ordination
5.11 Names and Directory Functions
6. Operation of Application-Entity-Invocations
6.1 Use of Application Associations
6.2 Use of the Presentation Service
6.3 Co-ordination of ASE Activities
6.4 Co-ordination of the Activities of an AE Invocation
6.5 Error Recovery within an Application-Association
7. Description of Application-Service-Element Standards
8. Abstract Syntax Definition
9. Registration Requirements
Annex A: Examples of the Structure of AE-Invocations

Provides a framework for coordinating the development of existing and future Application Layer Recommendations and Standards. Coverage includes: use of application associations; interaction with the Presentation layer; names and directory functions; abstract syntax definition; relationships among specifications. Also gives definitions, abbreviations and annexes.

This Recommendation | International Standard refines the description of the Application Layer contained in the Basic Reference Model for OSI (ITU-T Rec. X.200 | ISO/IEC 7498-1). It provides a framework for coordinating the development of existing and future Application Layer Recommendations and Standards. It is provided for reference by Application Layer Recommendations and Standards. In particular this Recommendation | International Standard: defines the nature of Recommendations and Standards in the Application Layer and the relationships among them; defines the architectural framework in which individual OSI Application Layer protocols are developed. defines concepts which provide a flexible approach to structuring in the Application Layer; defines the categories of identifiable objects which are necessary for the specification and operation of protocols; relates distributed information processing activities to the Recommendations and Standards in the Application Layer; structures, and relates, specifications in Application Layer Recommendations and Standards; identifies the various kinds of specification necessary in Application Layer Recommendations and Standards. This Recommendation | International Standard is provided for reference by Application Layer Recommendations and Standards. Its purpose is to facilitate a coherent and modular approach to the structuring of specifications for Application Layer behaviour. It neither specifies services nor protocols for OSI; nor is it an implementation specification for systems, nor a basis for appraising the conformance of implementations.