CONTENTS

  Title Page

  Copyright Page

  Preface

  1      Introduction

  1.1     Protocols

  1.2     Dialogues

  1.3     Entities

  1.4     Services
    1.4.1      Service Primitives
    1.4.2      Service Access Points
    1.4.3      Functional Units
    1.4.4      Tokens

  1.5     Protocol Control Information (PCI)

  1.6     Syntaxes

  1.7     Protocol Data Units (PDUs)

  1.8     Summary

  2      The Application Layer:  FTAM and ACSE

  2.1     FTAM Application Processes and Entities

  2.2     Overview of FTAM
    2.2.1      Basic Components of FTAM Communications
    2.2.2      The Virtual-Filestore Model
      2.2.2.1      File Attributes
      2.2.2.2      File Contents
      2.2.2.3      File Structure
      2.2.2.4      Access Contexts
      2.2.2.5      Constraint Sets
      2.2.2.6      Document Types
      2.2.2.7      Activity Attributes
    2.2.3      File-Service Model
      2.2.3.1      Regimes
      2.2.3.2      FTAM Services
      2.2.3.3      Relationship of Services to Regimes
    2.2.4      The File Protocol
    2.2.5      Summary of the FTAM Overview

  2.3     Overview of ACSE
    2.3.1      Establishing an Association
    2.3.2      Terminating an Association
    2.3.3      ACSE Services

  3      Introduction to Presentation and Session

  3.1     Context Management (Presentation)

  3.2     Connection Management (Presentation and Session)

  3.3     Dialogue Control (Presentation and Session)

  3.4     Information Transfer (Presentation and Session)

  3.5     Presentation and Session Services

  A   The Layers in the OSI Reference Model

  Glossary
    abstract syntax . . . alias
    AP title . . . basic encoding rules of a single ASN.1 type
    CEN/CENELEC . . . DCL
    decoding . . . entity
    event . . . file model
    file-open regime . . . FTAM
    FTAM-1 . . . FTAM system
    full support . . . initiator identity
    intermediate system . . . local data
    local file . . . open system
    Open Systems Interconnection . . . positional file transfer
    presentation address . . . real filestore
    receiver . . . SDU
    security attributes . . . service specification
    service user . . . token
    trace . . . virtual filestore
    virtual-filestore model . . . X.25 address

  FIGURES

  1-1        Movement of Service Primitives Between Service Users and Providers

  1-2        Relationship of a Service User, Service Provider, and SAP

  1-3        Indication of SAPs for Different OSI Layers

  1-4        Syntax Transformation

  1-5        The Relationship of PDUs, User Data, and SDUs

  2-1        Relationship of an FTAM Application Process and Entity

  2-2        Relationship Among Filestores During Data Transfer

  2-3        Schematic Representation of a File Tree

  2-4        Relationship of File Data and Structural Nodes

  2-5        Division of a File into File-Access Data Units (FADUs)

  2-6        Examples of File Structures

  2-7        Nesting of FTAM Regimes

  2-8        Relationship of File Services to Regimes

  TABLES

  1-1        Summary of Principal ISO Standards Implemented

  2-1        Supported Document Types

  2-2        FTAM File Services

  2-3        ACSE Services

  3-1        Presentation and Session Services

  A-1        Layers of the OSI Reference Model