0.    INTRODUCTION

       This specification provides the definition of the Directory
       definition message (DIRDEF) to be used in Electronic Data
       Interchange (EDI) between trading partners involved in
       administration, commerce and transport.

1.    SCOPE

1.1   Functional Definition

       This Directory definition message (DIRDEF) permits the transfer
       of the contents of a UN/EDIFACT Directory set or parts thereof.

1.2   Field of Application

       The Directory definition message may be used for both national
       and international trade. It is based on universal commercial
       practice and is not dependent on the type of business or
       industry.

1.3   Principles

       The Message allows the transmission of a UN/EDIFACT Directory
       set or parts thereof. A UN/EDIFACT Directory Set comprises:
       
       -Message type directory 
       -Segment directory 
       -Composite data element directory 
       -Simple data element directory 
       -Code list directory
       
       One occurrence of the message can contain only one version of a
       UN/EDIFACT Directory set or parts thereof.

2.    REFERENCES

       See UNTDID, Part 4, Chapter 2.6 UN/ECE UNSM - General Introduction,
       Section 1.

3.    TERMS AND DEFINITIONS

       See UNTDID, Part 4, Chapter 2.6 UN/ECE UNSM - General Introduction,
       Section 2.

4.    MESSAGE DEFINITION

4.1   Data Segment Clarification

       This section should be read in conjunction with the Branching
       Diagram and the Segment Table which indicate mandatory,
       conditional and repeating requirements.

   UNH, Message header
       A service segment starting and uniquely identifying a message.
       The message type code for the Directory definition message is
       DIRDEF.
       
       Note: Directory definition messages conforming to this document
       must contain the following data in segment UNH, composite S009:

       Data element  0065 DIRDEF
                     0052 D
                     0054 96B
                     0051 UN

   BGM, Beginning of message
       A segment to indicate the beginning of the message and to
       transmit function, type and number of the message.

   DII, Directory identification
       A segment specifying the identity of the directory set and
       giving its language and maintenance operation.

   DTM, Date/time/period
       A segment specifying dates related to the directory set, such
       as date of approval, date of submission or WP.4 acceptance
       date.

   FTX, Free text
       A segment providing free text information related to the
       directory set.


   Segment group 1: NAD-SG2
       A group of segments identifying the parties involved in the
       transaction with associated information.

      NAD, Name and address
          A segment identifying the parties involved in the
          transaction, e.g. originator, requestor or secretariat.


      Segment group 2: CTA-COM
          A group of segments identifying a person or a department and
          identifying communication type(s) and number(s).

         CTA, Contact information
             A segment identifying a person or a department for the
             party specified in the leading NAD segment to whom the
             communication should be directed.

         COM, Communication contact
             A segment identifying communication type(s) and number(s)
             of person(s) or department(s) specified in the associated
             CTA segment.


   Segment group 3: MSG-FTX-SG4
       A group of segments providing a message type directory.

      MSG, Message type identification
          A segment identifying a message type to be specified.

      FTX, Free text
          A segment providing textual information related to the
          message type, namely: message type name, Introduction,
          Scope, Functional definition, Principles, References and
          Terms and definitions.


      Segment group 4: SGU-FTX-SG5
          A group of segments specifying a message type structure and
          its related functional definition.

         SGU, Segment usage details
             A segment specifying the usage of a segment in a message
             type structure.

         FTX, Free text
             A segment providing textual information about segment
             usage. This information comprises part of the 'Data
             segment clarification' section.


         Segment group 5: GRU-FTX
             A group of segments identifying a segment group and
             providing details about segment group usage.

            GRU, Segment group usage details
                A segment specifying the usage of a segment group in a
                message type structure.

            FTX, Free text
                A segment providing the textual information about
                segment group usage. This information comprises part
                of the 'Data Segment Clarification' section.


   Segment group 6: SEG-FTX-ELU
       A group of segments providing a segment directory.

      SEG, Segment identification
          A segment identifying a segment type and specifying its
          class and maintenance operation.

      FTX, Free text
          A segment specifying the name and functional definition of a
          segment type.

      ELU, Data element usage details
          A segment specifying the contents of data elements in a
          segment type.


   Segment group 7: CMP-FTX-ELU
       A group of segments providing a composite data element
       directory.

      CMP, Composite data element identification
          A segment identifying a composite data element and
          specifying its class and maintenance operation.

      FTX, Free text
          A segment specifying the name and functional definition of a
          composite data element type.

      ELU, Data element usage details
          A segment specifying component data elements in a composite
          data element and its related information.


   Segment group 8: ELM-FTX
       A group of segments providing a data element directory.

      ELM, Simple data element details
          A segment identifying a simple data element and giving
          related information.

      FTX, Free text
          A segment specifying the name and functional definition of a
          simple data element.


   Segment group 9: CDS-FTX-SG10
       A group of segments providing a code list directory.

      CDS, Code set identification
          A segment specifying a code set. In DIRDEF data element 9434
          shall not be used.

      FTX, Free text
          A segment providing textual information related to the code
          list.


      Segment group 10:CDV-FTX
          A group of segments specifying a code value and its
          functional definition.

         CDV, Code value definition
             A segment specifying a code value.

         FTX, Free text
             A segment specifying the name and functional definition
             of a code value.

   UNT, Message trailer
       A service segment ending a message, giving the total number of
       segments in the message and the control reference number of the
       message.

4.2   Data segment index (Alphabetical sequence by tag)

          BGM Beginning of message
          CDS Code set identification
          CDV Code value definition
          CMP Composite data element identification
          COM Communication contact
          CTA Contact information
          DII Directory identification
          DTM Date/time/period
          ELM Simple data element details
          ELU Data element usage details
          FTX Free text
          GRU Segment group usage details
          MSG Message type identification
          NAD Name and address
          SEG Segment identification
          SGU Segment usage details
          UNH Message header
          UNT Message trailer

Contents of DIRDEF