Query functions have been implemented for GLPK (CPLEX breaks at the moment, I guess): These functions include:
retrieving one element of the coeff. matrix
retrieving one element of the obj function
lower bd for a variable
upper bound for a variable
lower and upper bounds for a row (these can not be handled separately at the moment)
direction of the optimization (is_max() function)

Document: lemon-refman

Title: LEMON Reference Manual

Author: LEMON Development Team

Abstract: Documentation of LEMON.

Section: unknown

Format: HTML

Index: /usr/share/doc/lemon/html/index.html

Files: /usr/share/doc/lemon/html/*.html