comp.lang.prolog Frequently Asked Questions 
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 comp.lang.prolog Frequently Asked Questions

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Archive-name: prolog/faq


Version: 1.9

     This article contains the answers to some Frequently Asked
Questions (FAQ) often seen in comp.lang.prolog.  It is posted
(twice a month) to help reduce volume in this newsgroup and to
provide hard-to-find information of general interest.

     This article includes answers to the following questions.

0. General information
1. What is the Association for Logic Programming?
2. Where can I get a public-domain, free Prolog for (the IBM PC,
   the Mac, Unix)?
3. What commercial systems are available?  What about systems
   available for a price from research institutions?
4. How do I get in touch with my Prolog's users' group,
   sales representative, or technical support line?
5. I think language X is better than Prolog.  What do you think?
6. My Prolog prof assigned me this problem.  Can you help
   me with it?
7. Can you suggest some books on Prolog?
8. Are there any FTP archive sites for comp.lang.prolog?

     Please forward suggestions for further questions and

Andrews).

Changes in this version:
* Added information about CLP(R).
* Changed wording of question 3.
* Clarified information in questions 2 and 3.

                        *       *       *

0. General information

     The newsgroup "comp.lang.prolog" discusses the language
Prolog and other "logic programming" languages.  Logic
programming languages, in general, are programming languages
which incorporate some of the language of mathematical logic;
unification and backtracking search are common operational
features.  For more background information about Prolog, see the
list of books in Question 7 of this list.

                        *       *       *

1. What is the Association for Logic Programming?

     To keep up with the current state of logic programming
technology, readers can join the Association for Logic
Programming (ALP) and receive their Newsletter.  For details on
how to join, contact:

        Cheryl Anderson,
        ALP Administrative Secretary,
        Dept. of Computing,
        Imperial College,
        180 Queen's Gate,
        London, SW7 2BZ, UK


Fax:    +44 71 589 1552
Phone:  +44 71 589 5111 x5011

     The Prolog Resource Guide (v0.6) was printed in issue 5/1
of the Newsletter (Feb. 1992). This lists information concerning
Prolog Archives, Books, Suppliers, etc.  It is now maintained by

posted periodically to comp.lang.prolog.

     To send in Newsletter contributions, write to:

        Andrew Davison,
        Dept. of Computer Science,
        University of Melbourne,
        Parkville,
        Melbourne, Victoria 3052,
        AUSTRALIA


Fax:    +61 3 348 1184
Phone:  +61 3 344 7207 / 5230
Telex:   AA 35185

                        *       *       *

2. Where can I get a public-domain, free Prolog for (the IBM PC,
   the Mac, Unix)?

     The following are anonymous-FTP sites for free Prologs
which are either in the public domain or are "copy-lefted"
(permitted to be copied with some restrictions on commercial use).

     [Please see Mark Kantrowitz's monthly "Prolog Resource
Guide" posting for information about non-free implementations.]

     (Please note that for extensive development work, users
will probably want a robust interpreter or compiler with good
debugging facilities and a standard syntax, among other things.
While public-domain systems are a valuable service to the
community, they do not necessarily have all these things, and
users should weigh carefully what they want to do against the
capabilities and costs of the available systems.)

For the IBM PC:
- BinProlog 1.39, anonymous FTP from clement.info.umoncton.ca
  (139.103.16.2), directory BinProlog.  Compiler for IBM PC 386.

- Anonymous FTP from aisun1.ai.uga.edu, directory ai.prolog;
  download "Contents" first.  Two systems.

- SWI Prolog, anonymous FTP from swi.psy.uva.nl (192.42.96.1),
  directory pub/SWI-Prolog; or from ftp.th-darmstadt.de
  (130.83.55.75), directory pub/programming/languages/prolog.
  Portable, copy-lefted.

For the Apple Macintosh:
- Anonymous FTP from aisun1.ai.uga.edu, directory ai.prolog;
  download "Contents" first.

- Open Prolog, anonymous FTP from grattan.cs.tcd.ie (or
  134.226.32.15), directory languages/open-prolog.  In
  binhex/stuffit form.

- UPMAIL Tricia Prolog, anonymous FTP from ftp.csd.uu.se
  (130.238.12.1), directory pub/Tricia; get README first.

For Unix systems:
- BinProlog 1.39, anonymous FTP from clement.info.umoncton.ca
  (139.103.16.2), directory BinProlog.  Compiler for SPARC and Sun/3.

- SWI Prolog, anonymous FTP from swi.psy.uva.nl (192.42.96.1),
  directory pub/SWI-Prolog; or from ftp.th-darmstadt.de
  (130.83.55.75), directory pub/programming/languages/prolog.
  Portable, copy-lefted.
- SB-Prolog, anonymous FTP from cs.arizona.edu, directory
  "sbprolog/v3".  Version 3.  Copy-lefted.
- Modular SB-Prolog (= SB-Prolog version 3.1 plus modules),
  anonymous FTP from ftp.dcs.ed.ac.uk (129.215.160.5), file
  pub/dts/mod-prolog.tar.Z .  Interpreter for SPARC.

- ALF (Algebraic Logic Functional language), WAM-based language
  with narrowing/rewriting, anonymous FTP from ftp.germany.eu.net,
  directory "pub/programming/languages/LogicFunctional".

- CLP(R), available by e-mail request from Joxan Jaffar,

  for academic and research purposes only.

                        *       *       *

3. What commercial systems are available?  What about systems
   available for a price from research institutions?

     Many commercial systems are listed in the periodically
posted Prolog Resource Guide.  The Resource Guide also lists
many systems which are not exactly "commercial", but available
for a price from research instutitions.  The list of such
systems was compiled by Chris Moss, of Imperial College.  The
rest of the Resource Guide was originally compiled by Dag
Wahlberg, of Uppsala University.

     The Resource Guide is now maintained by the kind efforts

posts it periodically on comp.lang.prolog.

     Readers should also note that the newly formed Prolog
Vendors' Group is contactable electronically via the Secretary,

                        *       *       *

4. How do I get in touch with my Prolog's users' group,
   sales representative, or technical support line?

     Here are some e-mail addresses of these contacts, listed
alphabetically by company or major product name.  Please note
that sometimes phoning or writing to the company will get better
response than e-mail.

ALS (Applied Logic Systems):



LPA:


PDC Prolog:



ProLog by BIM:

Prolog-2:

Quintus:



Sepia:


SICStus:



Turbo Prolog:
  Turbo Prolog is the older name for PDC Prolog (see above).

                        *       *       *

5. I think language X is better than Prolog.  What do you think?

     These debates rarely result in any productive discussion.
To some extent, one's favourite language is based on irrational
ideology.

     However, many people now agree that different languages are
good for different things.  Prolog seems to be good for problems
in which logic is intimately involved, or whose solutions have a
succinct logical characterization.  Like other interactive,
symbolic languages, Prolog is also good for rapid prototyping.

     Also, please note that there are many different "Prologs"
and other logic programming languages available, all with
different capabilities.

                        *       *       *

6. My Prolog prof assigned me this problem.  Can you help
   me with it?

     If your instructor assigned it to you, he or she probably
wanted you to do it yourself.  If it's an introductory Prolog
course, your question might be elementary to most readers, so it
might be a waste of network resources to ask it.  Please ask
your instructor, a friend, a teaching assistant, or a local
newsgroup for help first.

     That being said, there are comp.lang.prolog readers who
would be glad to help people making a legitimate attempt to
learn Prolog.

                        *       *       *

7. Can you suggest some books on Prolog?

     The Prolog Resource Guide (see above, question 3) contains
a listing of Prolog books.  It is maintained by Mark Kantrowitz

on comp.lang.prolog.

     Here are some of the most popular books on Prolog.

_Programming in Prolog_.  William F. Clocksin and Christopher S.
Mellish.  Springer-Verlag, 1987.  (Introductory.)

_The Art of Prolog:  Advanced Programming Techniques_.  Leon
Sterling and Ehud Shapiro.  MIT Press, 1986.  (Advanced.)

_The Craft of Prolog_.  Richard A. O'Keefe.  MIT Press, 1990.
(Advanced.)

_Foundations of Logic Programming_.  John Lloyd.
Springer-Verlag, 1988 (2nd ed).  (Logic programming theory.)

                        *       *       *

8. Are there any FTP archive sites for comp.lang.prolog?

     Yes.  As of the latest check, the following archive sites
contain selected recent articles from comp.lang.prolog in the
indicated directories.

"cs.dal.ca": /pub/comp.archives/comp.lang.prolog
"pit-manager.mit.edu": /pub/usenet/comp.lang.prolog
"src.doc.ic.ac.uk": /usenet/comp.archives/auto/comp.lang.prolog
"cnam.cnam.fr": /pub/Archives/comp.archives/auto/comp.lang.prolog

     Some other sites contain copies of this FAQ list and the
Prolog Resource Guide.  For users with "archie" access, type
"archie comp.lang.prolog" for an up-to-date list of sites having
either archives or the periodic postings.

                        *       *       *

Acknowledgements

     For help in putting together this FAQ, thanks to Andrew
Davison, Mike Brady, Michael Covington, Stephen Bevan, John
Dowding, Thilo Kielmann, Paul Singleton, Dave Moffatt, Dani de
Ridder, Per Bilse, Chris Moss, Kathleen Pierco, Paul Tarau,
Jonathan Kamens, Jan Wielemaker, Dag Wahlberg, Micha Meier, Don
Sannella, Clive Spenser, Yuan Liu, Jonas Barklund, and Ian
{*filter*}inson.  Special thanks to John Dowding for suggesting a good
format for the list, and to Chris Moss, Dag Wahlberg, and Mark
Kantrowitz for their work on the Prolog Resource Guide.

--Jamie Andrews.



Fri, 18 Aug 1995 18:00:08 GMT  
 
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