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Date:Mon Aug 21 21:57:13 1993 
Subject:New version of Eden, and Prolog PD library 
From:Jocelyn Paine 
Volume-ID:930821.01 

Those who read comp.lang.prolog will see that I have posted a new
version of my library of public-domain Prolog software. It contains a
new version of Eden, which I have been using for teaching this term.
This includes a production-system "bug", and tutorial notes for novices
(in Latex format) on using Eden and the editor, creating worlds,
production systems, and some basic ideas of AI. This version of Eden is
incompatible with the last, and is not intended for the competition. As
before, it is written for Poplog.

There are various other new Prolog programs in the library. To access,
do anonymous FTP to the Imperial College archive. The archive's FTP
address is
    src.doc.ic.ac.uk

The equivalent numerical address is
    146.169.2.1

You access this archive in the normal way. Give your login name as
    anonymous
and use your Email address for the password. If, having logged in, you
find that your system can't cope with the messages from the FTP (one
symptom of this may be that when you do an 'ls', you get the message
'can't build data connection'; another may be system responses not
arriving until after the following command), then log out, and log in
again, with - as the first character of the password. This trick applies
to most FTP systems, by the way.

The entries live in the directory
        computing/programming/languages/prolog/pd-software
with a short-cut entry of:
        packages/prolog-pd-software
I.e., to access it, 'cd' to either of the above.

The older entries are stored as <entry>.tar.Z. They are in compressed
TAR format, so once you have fetched them, uncompress, and then de-tar
the result. Users of Unix systems should have no problem with this,
since tar and uncompress are standard utilities. Those using other
systems may not be so lucky, though they are now available for VMS and
MS-DOS at least.

Newer entries are stored as <entry>.zip. Use UNZIP to restore them.
The reason for this is that our tar program is now giving problems.

Remember - whichever entry you fetch, you must do so in BINARY mode.
FTP systems work in ASCII by default, so you must issue the BINARY
command before fetching any files.

The file README gives a brief summary of the contents of the directory,
while CATALOGUE is a much fuller description. Both these are in plain
text, so must be fetched in ASCII mode.      

Note: as I have only just sent the new entries, readme file, and
catalogue, these are at present in the /tmp directory. They should be
transferred to their normal place in the next few days.


Jocelyn Paine