DBEDIT_BASIC

       Subroutine of DBEDIT_BASIC to edit a database on a dumb terminal.

       Interactively edit specified fields in a database.  The
       value of each field is displayed, and the user has the option
       of changing or keeping the value.

       dbedit_basic, list, [ items ]

       list - scalar or vector of database entry numbers.  Set LIST=0
               to interactively add a new entry to a database.

       items - list of items to be edited.  If not supplied, then the
               value of every field will be displayed.

       (1) Database must be opened for update (dbopen,,1) before
       calling DBEDIT_BASIC.  User must have write privileges on the database
       files.
       (2) User gets a second chance to look at edited values, before
       they are actually written to the database

       The item values for each entry to be edited are first displayed
       User is the asked "EDIT VALUES IN THIS ENTRY (Y(es), N(o), or Q(uit))?
       If user answers 'Y' or hits RETURN, then each item is displayed
       with its current value, which the user can update.  If user answered
       'N' then DBEDIT_BASIC skips to the next  entry.   If user answers 'Q'
       then DBEDIT will exit, saving all previous changes.

       Suppose V magnitudes (V_MAG) in a database STARS with unknown values
       were assigned a value of 99.9.  Once the true values become known, the
       database can be edited
       IDL> !PRIV=2 & dbopen,'STARS',1         ;Open database for update
       IDL> list =  dbfind('V_MAG=99.9')       ;Get list of bad V_MAG values
       IDL> dbedit,list,'V_MAG'       ;Interactively insert good V_MAG values

       Written  W. Landsman     STX        April, 1989
       Rename DBEDIT_BASIC from DBEDIT            July, 1993
       Converted to IDL V5.0   W. Landsman   September 1997
       Change DATATYPE() to size(/TNAME)  W. Landsman   November 2001

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