CONTENTS

                     Directory definition message



0.   INTRODUCTION

1.   SCOPE

     1.1   Functional definition
     1.2   Field of application
     1.3   Principles

2.   REFERENCES

3.   TERMS AND DEFINITIONS

4.   MESSAGE DEFINITION
     4.1   Data segment clarification
     4.2   Data segment index(alphabetical sequence)
     4.3   Message structure
           4.3.1 Segment table