[Coin-discuss] AMPL interface to CLP?
Robin Lougee-Heimer
robinlh at us.ibm.com
Sat Jan 7 15:02:51 EST 2006
Bob:
Thanks for the sample legal-wording and pointers to the where to find the
specific language.
Robin
----------------------------------------------------------------------------------
Robin Lougee-Heimer
IBM TJ Watson Research Center
1101 Kitchawan Road, Yorktown Heights, NY 10598
ph: 914-945-3032 fax: 914-945-3434
robinlh at us.ibm.com
http://www.coin-or.org
"Robert Fourer" <4er at iems.northwestern.edu>
Sent by: coin-discuss-bounces at list.coin-or.org
01/07/2006 01:33 PM
Please respond to
4er and Discussions about open source software for Operations Research
To
"'Discussions about open source software for Operations Research'"
<coin-discuss at list.coin-or.org>
cc
"'Brian Kernighan'" <bwk at ampl.com>, "'David M. Gay'" <dmg at ampl.com>
Subject
RE: [Coin-discuss] AMPL interface to CLP?
Robin,
The legal language for the AMPL-Solver Library only appears, as far as I'm
aware, in the source and header files themselves. As an example, the
notice at the beginning of asl.h is copied below. Perhaps this doesn't
qualify as release under a certified open-source license, but it seems to
be sufficient to enable people to build and distribute AMPL-solver
drivers. At least, I am pretty sure that every connection from AMPL to
one of the solvers listed at www.ampl.com/solvers.html makes use of these
routines.
I'm copying this to Dave Gay and Brian Kernighan, who might have further
insights.
-- Bob
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From: coin-discuss-bounces at list.coin-or.org
[mailto:coin-discuss-bounces at list.coin-or.org] On Behalf Of Robin
Lougee-Heimer
Sent: Saturday, January 07, 2006 9:58 AM
To: coin-discuss at list.coin-or.org
Subject: RE: [Coin-discuss] AMPL interface to CLP?
Bob:
>the entire AMPL-solver library is open-source,
>available at http://www.netlib.org/ampl/solvers/.
Under what OSI-certified open-source licence?
I didn't see any mention of license in the README file of this directory,
or any LICENSE file.
Thanks,
Robin
----------------------------------------------------------------------------------
Robin Lougee-Heimer
IBM TJ Watson Research Center
1101 Kitchawan Road, Yorktown Heights, NY 10598
ph: 914-945-3032 fax: 914-945-3434
robinlh at us.ibm.com
http://www.coin-or.org
"Robert Fourer" <4er at iems.northwestern.edu>
Sent by: coin-discuss-bounces at list.coin-or.org
01/06/2006 07:35 PM
Please respond to
4er and Discussions about open source software for Operations Research
To
"'Discussions about open source software for Operations Research'"
<coin-discuss at list.coin-or.org>
cc
Subject
RE: [Coin-discuss] AMPL interface to CLP?
I would add that the entire AMPL-solver library is open-source, available
at
http://www.netlib.org/ampl/solvers/. Instructions for using the library
to
write an AMPL-solver "driver" are at http://www.ampl.com/hooking.html.
Source
for many previously written drivers is also available, in the same
location as
the library source, so it's often possible to modify an existing driver
rather
than start from scratch.
Leo makes a good point of mentioning the work with LPFML and OSiL, which
is
intended to eventually render it unnecessary to write a separate driver
for
every modeling-language/solver pair. I don't think that this will be
complete
within the next 6 months, however.
Bob Fourer
4er at iems.northwestern.edu
> -----Original Message-----
> From: coin-discuss-bounces at list.coin-or.org [mailto:coin-discuss-
> bounces at list.coin-or.org] On Behalf Of Leo Lopes
> Sent: Friday, January 06, 2006 5:18 PM
> To: Discussions about open source software for Operations Research
> Subject: Re: [Coin-discuss] AMPL interface to CLP?
>
> You can use CLP from AMPL by generating LPFML files using a driver
> than then invokes CLP via OSI. You can download the latest LPFML
> distribution for this purpose. Since LPFML is no longer active pending
> the release of the OSiL libraries, you might also consider writing
> your own AMPL OSI driver, which should be fairly simple for the LP
> case. There is a document on the AMPL web site that explains how to do
> it...
>
> Cheers,
> Leo.
>
> On 1/6/06, Gardner Pomper <gardner at networknow.org> wrote:
> > Hi,
> >
> > We would like to start using CLP for our ampl models. Does anyone know
if
> > there is an AMPL interface for it? Is it just in the package, or is it
> > seperate?
> >
> > Thanks,
> > - Gardner
> >
> >
> > _______________________________________________
> > Coin-discuss mailing list
> > Coin-discuss at list.coin-or.org
> > http://list.coin-or.org/mailman/listinfo/coin-discuss
> >
> >
> >
>
>
> --
> ========================================================================
> Leonardo B. Lopes leo at sie.arizona.edu
> Assistant Professor (520)621-2342
> SIE - University of Arizona http://www.sie.arizona.edu/faculty/leolopes
>
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