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                                  D S C O N V

          This is a program to produce 1032  DMD  (Data  Definition)  files
     from 1022 datasets.  It optionally also dumps ASCII data record files.

     AUTHOR:  Coleman P. Harrison
     DATE WRITTEN:  June 28, 1983
     DATE MODIFIED:  April 18, 1984

                               C O P Y R I G H T

     (C) 1983, 1984
     Copyright Software House

                                 N O T I C E S

          This program is in no way  intended  as  a  piece  of  production
     software.   As such, neither the author nor Software House assumes any
     responsibility for its functioning.  Absolutely no support is intended
     or implied.

          This program (in part or total) may  be  freely  copied  for  any
     non-profit  purposes.  All copies must include the above copyright and
     these notices.  Any reproduction (in part or total) of  this  software
     for  profit or any reproduction which excludes the above copyright and
     these notices will be considered grounds for punitive legal action.

          Users are encouraged to mail their name and address to:

               Coleman P. Harrison  
               Software House  
               1105 Massachusetts Avenue  
               Cambridge, Massachusetts 02138  

          If and when new versions are produced we will consider  notifying
     all  users  so  identified.   We  are,  of  course, also interested in
     hearing about  any  enhancement.   We  assume  no  responsibility  for
     supporting this program.

                             D E S C R I P T I O N

          The purpose of the program is to provide an automated  method  to
     convert  System  1022 datasets to System 1032.  It runs with 1022 on a
     DECSystem-10 or -20.  It asks for a filespec, obtains  information  on
     the  dataset(s) in it by means of calls on DBINFO, and produces a 1032
     DMD which can be used to CREATE analogous 1032 dataset(s)  on  a  VAX.
     Optionally, it will also dump each dataset's data to a DMI file.
                                                                     Page 2

          Attribute  names,  abbreviations,  key  status,  and  ranges  are

          1022 single integer attributes have the default range  of  -2**35
     to  +2**35-1  unless  the  user  defined  a  range.   Double integers,
     available starting with Version 116 of 1022,  can  range  as  high  as
     2**71.   This program translates such integers to 1032 double integers
     whose range is up to 2**63.  However, if the 1022 data exceeds  2**63,
     this  will  produce  conversion  errors  during  the load to 1032.  To
     retain more than 63 bits (18.9 decimal digits) of precision, the  1032
     Decimal  datatype  must  be  used;   the required syntax is noted in a
     comment in any datasets in which this problem could arise so that  the
     user could then edit his/her DMD file.

          In most cases, one can't improve  on  the  1032  default  formats
     without  knowing  what  the  data  looks  like;   usually, the default
     results will be closer to what 1022 displays than  any  other  choice,
     although  the  results  are usually not exactly the same as the output
     from 1022.  One main difference is that 1022 chooses the width of each
     occurrence  of  each  attribute according to its individual value, but
     1032 does so for the attribute itself based  only  on  its  range  and
     precision.   The A format with no width is available in 1032 beginning
     with V2.00;  it is the default in 1022,  and  the  user  may  want  to
     specify  it  for  text  attributes  if  the  space-filling behavior is

          The program does assign a format for real  attributes,  since  in
     that case, while there is no single 1032 format that replicates 1022's
     behavior in all  cases,  the  E+10.4  choice  comes  closer  than  the
     default.   Formats  are  also included in the RD's for dates;  this is
     necessary so that the output of 1022's DUMP command will  be  readable
     by  1032.  RD_Missing items are included so that blank text attributes
     will not become MISSING in 1032.

          Prompts are generated by replacing underscores  with  spaces  and
     capitalizing  the  first  letter of each word.  Titles are the same as
     prompts except that lines are broken where appropriate.

          Dataset and database names are truncated to 9  characters  (after
     eliminating  any underscores).  This is not strictly necessary, but it
     is advisable because the user has to be more knowledgeable  to  handle
     those  with longer names.  (Filenames (such as DMI, DMO, DMD, and DME)
     would have to be specified each time one is needed, or else RMS  would
     choke  on  the name 1032 generates.) DMI file names are truncated to 6
     characters for compatibility  with  old  TOPS-10.   Unique  names  are
     generated if these truncations result in several datasets or DMI files
     having the same name.

                           M O D I F I C A T I O N S

     1.  Double length 1022 integers (available starting with Version  116)
         are now supported (but see the above discussion).
                                                                     Page 3

     2.  Single length integers whose value is  greater  than  2**31,  i.e.
         which  are  in  the  double  integer  category  for 1032, now load

     3.  Integer of identification, date of entry, and date of  change  are
         now supported (available in 1032 starting with Version 2).

     4.  Dates dumped with a length of 6 or 7 are now specified as Format 5
         so that they will be read correctly by 1032.

     5.  The program can now be run with Version 114 of 1022;  however,  if
         there  is  more  than  one  dataset  stored in a file, Version 114
         cannot retrieve the dataset names, so the program uses  DS1,  DS2,

                            I N S T A L L A T I O N

          The tape was written on our DECSystem-20 at  1600  b.p.i.   using
     DUMPER  under  TOPS-20  version  4.1.   It  contains two copies of the
     following files:


          If you are using version 116A of 1022 on  TOPS-20,  you  can  run
     DSCONV.EXE.   Otherwise  you  should  reload DSCONV with your system's
     version of 1022 by means of:

               LOAD DSCONV, SYS:HR1022/LIB

          If you have any questions, please call Coleman Harrison at  (617)