File  README      ..... about the DIRDIF files ......     27 Oct. 1999

       This file is for current information, important news, etcetera.

       In July 1999, we have installed the new version: DIRDIF-99.2 .
The MSDOS-PC and Silicon Graphics versions are working fine, and some
helpful DIRDIF users  have solved other unix implementation problems,
so recent updates have been stored at the ftp site.
Please, try, and let us know !

The new version (relative to DIRDIF-96) is much more powerful, and can
accept quit some deviations from correct cell contents (!) but we have
some unresolved unstabilities which may surprise you. Please, tell us!

The updated  DIRDIF USER's GUIDE  will be made available in Nov. 1999,
it is needed for optimal use of DIRDIF .

The DIRDIF WWW home page is: http://www-xtal.sci.kun.nl/xtal/dirdif/ ,
which also gives a link to the following DIRDIF ftp site.

The DIRDIF ftp site is: ftp.sci.kun.nl .
To get files by ftp,   enter:  ftp  ftp.sci.kun.nl
       as user name,   enter:  anonymous
       as password enter your own e-mail address
       when logged on, enter:  cd pub/dirdif
       [ Note the file names ( enter: ls ) ]

====>  then read or 'get' the file README.FTP  <======================

       which tells you which files you may need,
       and how to get those files.

Contents of README files: available files; implementation instructions
   README       this file
   README.FTP   available ftp-files; how to get the files you may need
   README.PC    ZIP files and implementation for MSDOS PC's 
   README.UNIX  zip and tar files etc. for unix ( aix, linux, .. )
   README.ZIP   notes about ' how to unzip ' .
   README.TAR   notes about ' how to decompress ' for unix only.
   README.ALL   about all individual files ( not zipped, etc. )
   README.CC    how to get data for about 20 test structures .

In most cases  the DIRDIF system is  implemented/generated/installed
while being in your local directory  'ddroot/ddftp'  by entering
'ddmake' or 'install' . 
Implementation instructions for unix are given in file ddimplem.unix 
and for other computers in similar files (ddimplem.vax, README.PC)..

If your implementation is completed, and the DIRDIF tests runs  gave
perfect results then, please, read the file 
( PC: )  --/DDROOT/README
(unix:)  --/ddroot/dirdif.readme
                                              Thank you.
                                              
====================================================================
Prof. Paul T. Beurskens                       e-mail: ptb@sci.kun.nl
LABORATORIUM    VOOR    KRISTALLOGRAFIE       ======================
University of Nijmegen,  Toernooiveld 1       Phone:  +31-24-3652188
6525 ED NIJMEGEN        The Netherlands       Home:   +31-24-3580219
                                              Telefax:+31-24-3653177
====================================================================
DIRDIF ftp site:   ftp ftp.sci.kun.nl ;   anonymous ;  cd pub/dirdif
DIRDIF WWW home page :       http://www-xtal.sci.kun.nl/xtal/dirdif/
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