18 * @brief OS instance language (OSiL) format file reader
19 * @author Stefan Vigerske
20 *
21 * This reader allows to parse OSiL files with linear and nonlinear constraints and objective.
22 * Writing is not implemented yet.
23 *
24 * The OSiL format is an XML based format to represent a broad class of mathematical programming instances, see http://www.coin-or.org/OS/OSiL.html .