# @(#)AAREADME	17.1.1.1 (ESO-IPG) 01/25/02 17:36:43
*******************
* Tables Version 3.0
* FO June 1990
*******************

  Table access routines

  TC  - column access
  TD  - descriptor access
  TE  - element access
  TR  - row access
  TT  - table access
  TZx - (i = 1, ..., 8) low level routines, which are:
  
  TZ0  Deals with NULL values
  TZ1  Check of legal parameters (formats, etc), and compute position 
       in buffer depending on table organisation (record / transposed)
  TZ2  Some string utilities
  TZ3  Conversions (ascii to binary and vice-versa)
  TZ4  error handler
  TZ5  Management of Table Structures
  TZ6  Low level Read / Write
  TZ8  Management of Overfolw Mechanism
  TZ9  Search algorithms

Include files
-------------
tbldef.h   required for applications using the tables
tblsys.h   only required for compilation of the above modules.
		Some parameters on this file may be adjusted

New Features
============

1. Each column  may be an array.
   Syntax: CREA/COL table label type(n) "unit" format
2. Options at TCTOPN / TCTINI :
      modifiers F_MAP_FORCE	forces the mapping
      modifiers F_EIO_FORCE	forces the elementary io's
    
    ... + number of columns !
3. Sorting revisited
4. Specify selection of lines as
     @a..b,c..d[,...]	with ranges
   and selection of Columns as
     #1,4,3    or :x,y,..
5. New Formats available:
   A/ small letters generally ask for SIGNED number
      F12.5    applied on 12.5 results in    "    12.50000"
      f12.5    applied on 12.5 results in    "   +12.50000"
   B/ Zero-filled values with
      Zx.y    or zx.y
   C/ Sexagesimal values
      Sx.y    or sx.y   (e.g. declinations)
      Rx.y    or rx.y   (for right ascensions, factor of 15)
   D/ Date + Time

New Entry Points
================
TCBGET (tid, int column, &dtype, &items, &bytes);
TCCSEL (tid, char *text, int max_cols, long &cols[], long &flags[])
TCEMAP (tid, int row, int column, &&addr, &isnull);
TCOGET ("option_name", value)
TCRSEL (tid, char *text, int max_ranges, long &lower[], long &upper[])