Re: [Help-glpk] A new text-based data format for GLPK

[Robbie Morrison]

Hello GLPK users

For your interest, here are two references on XML and
linear programming in relation to the Opimization
Services project -- mentioned in an earlier post by
Robert Fourer (Sun, 3 Jan 2010 20:32:35 +0300).

Fourer etal (2008) contains a number of examples of XML
for describing (problem) instances, results, and
(solver) options.  These examples are well worth
studying.  GLPK also gets a mention (p22).

Personally I don't use an external LP data-model in my
project, so I can't comment on the appropriateness of
the Optimization Services initiative (instead I work
internally with the GLPK APIs).  That said, either
structured-text or XML export (if developed for GLPK)
will doubtless be available as a library function and
could well prove useful when debugging host applications.

with best wishes, Robbie

    ---

    Fourer, Robert, Horand Gassmann, Jun Ma, Kipp Martin,
      and Wayne Sheng
    2008
    Optimization Services 1.0 user's manual
    March 24, 2008

    file: osUsersManual_1.pdf
    download:

https://projects.coin-or.org/OS/export/996/trunk/OS/doc/osUsersManual_1.pdf

    Abstract: This is the User's Manual for the Optimization
    Services (OS) project.  The objective of (OS) is to
    provide a general framework consisting of a set of
    standards for representing optimization instances,
    results, solver options, and communication between
    clients and solvers in a distributed environment using
    Web Services.  This COIN-OR project provides C++ and
    Java source code for libraries and executable programs
    that implement OS standards.  The OS library includes a
    robust solver and modeling language interface (API) for
    linear, nonlinear and other types of optimization
    problems.  Also included is the C++ source code for a
    command line executable 'OSSolverService' for reading
    problem instances (OSiL format, nl format, MPS format)
    and calling a solver either locally or on a remote
    server.  Finally, both Java source code and a Java 'war'
    file are provided for users who wish to set up a solver
    service on a server running Apache Tomcat.  See the
    Optimization Services (OS) home page
    'www.optimizationservices.org' and the COIN-OR Trac page
    'projects.coin-or.org/OS' for more information.

    ---

    Fourer, Robert, L Lopes, and Kipp Martin
    2005
    LPFML : a W3C XML schema for linear and integer programming
    INFORMS Journal on Computing
    17:139- 158

---
Robbie Morrison
PhD student -- policy-oriented energy system simulation
Technical University of Berlin (TU-Berlin), Germany
University email (redirected) : address@hidden
Webmail (preferred)           : address@hidden
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