0.    INTRODUCTION

       This specification provides the definition of the Work item
       quantity determination message (CONWQD) to be used in
       Electronic Data Interchange (EDI) between trading partners
       involved in administration, commerce and transport.

1.    SCOPE

       There are occasions during the construction process when it is
       required to substantiate the quantities associated with
       specific sections of work. This message will be needed by
       various parties involved in the project to determine these
       quantity details.

1.1   Functional Definition

       Typically this message will be used between a contractor and
       the client's representative or other partners within the
       construction process, for justifying the work item quantities
       given in messages that describe the work items or their
       progress valuations.

1.2   Field of Application

       This message type may be applied for both national and
       international trade. It is based on universal practice and is
       not dependent on the type of business or industry.

1.3   Principles

       There are several examples within the construction process
       where one party is required to justify to another party the
       quantities per work item he has already given in earlier
       messages.
       
       A project may be subdivided into individual groupings of work,
       referred to as items and it is against the quantities of these
       items that a justification has to be given.
       
       Within the Construction industry there are numerous rules which
       govern this part of the process. Although efforts have been
       made to keep the design of the message generic, other potential
       users of this message are cautioned about the specific and
       original role for which it has been designed.
       
       This is only one of a number of messages being designed for the
       construction industry. This particular message refers to
       already described items of work or their progress valuation in
       earlier sent construction messages.
       
       This message is for verifiable and provable quantities per work
       item which include individual calculations with sub- and
       intermediate totals. The message contains the quantities and
       how they are assessed for each of the work items. For every
       work item the quantity per unit must be determined (except
       those with a flat rate, which are paid according to payment
       schedules). The unit of quantity is defined by common technical
       rules. Rules describe the way in which quantities are
       calculated. These use standard formulae.

2.    REFERENCES

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

3.    TERMS AND DEFINITIONS

3.1   Standard 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 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 Work item quantity determination
       message is CONWQD.
       
       Note: Work item quantity determination messages conforming to
       this document must contain the following data in segment UNH,
       composite S009:

       Data element  0065 CONWQD
                     0052 D
                     0054 97A
                     0051 UN

   BGM, Beginning of message
       A segment for unique identification of the Work Item Quantity
       Determination document name, number and function.

   DTM, Date/time/period
       A segment specifying the dates that apply, e.g. date of
       valuation, date of submission, acceptance date, etc.

   AUT, Authentication result
       A segment used to authenticate the message by exchanging a
       password or some other form of identification agreed between
       the trading partners.

   FTX, Free text
       A segment with free text information, in coded or clear form,
       used for any textual qualification. In computer to computer
       exchanges, such text will require the receiver to process this
       segment manually.


   Segment group 1: RFF-DTM
       A group of segments for quoting references and their relevant
       dates that are applicable to the message.

      RFF, Reference
          A segment for quoting references that are applicable to this
          message. e.g. contract identity, operational references,
          determination reference number of a former message.

      DTM, Date/time/period
          Date of references quoted in the previous RFF segment.


   Segment group 2: NAD-LOC-FII-SG3-SG4-SG5
       A group of segments identifying the parties with associated
       information.

      NAD, Name and address
          A segment identifying names and addresses of the parties, in
          coded or clear form, and their functions relevant to the
          Work Item Quantity Determination Message. Identification of
          the contractor and client parties is mandatory for the Work
          Item Quantity Determination Message. It is recommended that
          where possible only the coded form of the party ID should be
          specified.

      LOC, Place/location identification
          A segment giving more specific location information of the
          party specified in the NAD segment e.g. internal
          site/building number.

      FII, Financial institution information
          A segment identifying the financial institution (e.g. bank)
          and relevant account numbers for the contractor, client and
          where necessary other parties.


      Segment group 3: RFF-DTM
          A group of segments giving references only relevant to the
          specified party rather than the whole message.

         RFF, Reference
             A segment identifying the reference by its number and
             where appropriate a line number within a document.

         DTM, Date/time/period
             A segment specifying the date and/or time related to the
             reference.


      Segment group 4: DOC-DTM
          A group of segments identifying the documentary requirements
          of the specified party.

         DOC, Document/message details
             A segment identifying and providing information relating
             to the documents required by the party specified by the
             NAD.

         DTM, Date/time/period
             A segment specifying the date and/or time of the
             document.


      Segment group 5: CTA-COM
          A group of segments giving contact details of the specific
          person or department within the party identified in the NAD
          segment.

         CTA, Contact information
             A segment to identify a person or department, and
             associated function, to whom communications should be
             directed.

         COM, Communication contact
             A segment to identify a communication type and number for
             the contact specified in the CTA segment.


   Segment group 6: BII-QTY-SG7-SG8
       A group of segments providing the quantity determination for
       each work item. A quantity determination can consist of several
       "calculation lines".

      BII, Structure identification
          A segment to identify the item of work to which this
          quantity determination applies.

      QTY, Quantity
          A segment giving control totals for this work item.


      Segment group 7: RFF-FTX-DTM
          A segment group enabling a reference for the work item.

         RFF, Reference
             A segment giving a reference for the work item within the
             whole project.

         FTX, Free text
             A segment giving a narrative description of the
             reference.

         DTM, Date/time/period
             A segment giving a date when the reference in this
             segment group was related to project documentation.


      Segment group 8: LIN-GIS-FTX-SG9
          A segment group giving the calculation lines and their
          values for the work item identified in the BII segment.

         LIN, Line item
             A segment identifying a calculation line within a work
             item.

         GIS, General indicator
             A segment indicating how this calculation must be
             interpreted.

         FTX, Free text
             A narrative description concerning the whole work item or
             only the calculation given in segment group 9.


         Segment group 9: QTY-GIS-RFF-FTX
             A segment group giving the details of the calculation
             lines.

            QTY, Quantity
                A segment giving the values and factor of this
                calculation line.

            GIS, General indicator
                A segment indicating, when necessary, mathematical
                signs for the values given in the QTY segment.

            RFF, Reference
                A segment giving either:
                - the reference of an existing calculation line for
                this work item, identified in the BII segment, when
                its result is used in the current calculation line, or
                - when a standard formula is used, its reference
                number.

            FTX, Free text
                Where a calculation line is not based upon a standard
                formula, the free and unstructured calculation and its
                values can be given in this segment.

   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)

          AUT Authentication result
          BGM Beginning of message
          BII Structure identification
          COM Communication contact
          CTA Contact information
          DOC Document/message details
          DTM Date/time/period
          FII Financial institution information
          FTX Free text
          GIS General indicator
          LIN Line item
          LOC Place/location identification
          NAD Name and address
          QTY Quantity
          RFF Reference
          UNH Message header
          UNT Message trailer

Contents of CONWQD