[Coin-discuss] AMPL interface to CLP?

Sat Jan 7 13:33:31 EST 2006

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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> Coin-discuss at list.coin-or.org
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