diff --git a/lemon/soplex.h b/lemon/soplex.h
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+/* -*- mode: C++; indent-tabs-mode: nil; -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library.
+ *
+ * Copyright (C) 2003-2008
+ * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Research Group on Combinatorial Optimization, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+#ifndef LEMON_SOPLEX_H
+#define LEMON_SOPLEX_H
+
+///\file
+///\brief Header of the LEMON-SOPLEX lp solver interface.
+
+#include <vector>
+#include <string>
+
+#include <lemon/lp_base.h>
+
+// Forward declaration
+namespace soplex {
+  class SoPlex;
+}
+
+namespace lemon {
+
+  /// \ingroup lp_group
+  ///
+  /// \brief Interface for the SOPLEX solver
+  ///
+  /// This class implements an interface for the SoPlex LP solver.
+  /// The SoPlex library is an object oriented lp solver library
+  /// developed at the Konrad-Zuse-Zentrum für Informationstechnik
+  /// Berlin (ZIB). You can find detailed information about it at the
+  /// <tt>http://soplex.zib.de</tt> address.
+  class SoplexLp : public LpSolver {
+  private:
+
+    soplex::SoPlex* soplex;
+
+    std::vector<std::string> _col_names;
+    std::map<std::string, int> _col_names_ref;
+
+    std::vector<std::string> _row_names;
+    std::map<std::string, int> _row_names_ref;
+
+  private:
+
+    // these values cannot be retrieved element by element
+    mutable std::vector<Value> _primal_values;
+    mutable std::vector<Value> _dual_values;
+
+    mutable std::vector<Value> _primal_ray;
+    mutable std::vector<Value> _dual_ray;
+
+    void _clear_temporals();
+
+  public:
+
+    /// \e
+    SoplexLp();
+    /// \e
+    SoplexLp(const SoplexLp&);
+    /// \e
+    ~SoplexLp();
+    /// \e
+    virtual SoplexLp* newSolver() const;
+    /// \e
+    virtual SoplexLp* cloneSolver() const;
+
+  protected:
+
+    virtual const char* _solverName() const;
+
+    virtual int _addCol();
+    virtual int _addRow();
+    virtual int _addRow(Value l, ExprIterator b, ExprIterator e, Value u);
+
+    virtual void _eraseCol(int i);
+    virtual void _eraseRow(int i);
+
+    virtual void _eraseColId(int i);
+    virtual void _eraseRowId(int i);
+
+    virtual void _getColName(int col, std::string& name) const;
+    virtual void _setColName(int col, const std::string& name);
+    virtual int _colByName(const std::string& name) const;
+
+    virtual void _getRowName(int row, std::string& name) const;
+    virtual void _setRowName(int row, const std::string& name);
+    virtual int _rowByName(const std::string& name) const;
+
+    virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);
+    virtual void _getRowCoeffs(int i, InsertIterator b) const;
+
+    virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);
+    virtual void _getColCoeffs(int i, InsertIterator b) const;
+
+    virtual void _setCoeff(int row, int col, Value value);
+    virtual Value _getCoeff(int row, int col) const;
+
+    virtual void _setColLowerBound(int i, Value value);
+    virtual Value _getColLowerBound(int i) const;
+    virtual void _setColUpperBound(int i, Value value);
+    virtual Value _getColUpperBound(int i) const;
+
+    virtual void _setRowLowerBound(int i, Value value);
+    virtual Value _getRowLowerBound(int i) const;
+    virtual void _setRowUpperBound(int i, Value value);
+    virtual Value _getRowUpperBound(int i) const;
+
+    virtual void _setObjCoeffs(ExprIterator b, ExprIterator e);
+    virtual void _getObjCoeffs(InsertIterator b) const;
+
+    virtual void _setObjCoeff(int i, Value obj_coef);
+    virtual Value _getObjCoeff(int i) const;
+
+    virtual void _setSense(Sense sense);
+    virtual Sense _getSense() const;
+
+    virtual SolveExitStatus _solve();
+    virtual Value _getPrimal(int i) const;
+    virtual Value _getDual(int i) const;
+
+    virtual Value _getPrimalValue() const;
+
+    virtual Value _getPrimalRay(int i) const;
+    virtual Value _getDualRay(int i) const;
+
+    virtual VarStatus _getColStatus(int i) const;
+    virtual VarStatus _getRowStatus(int i) const;
+
+    virtual ProblemType _getPrimalType() const;
+    virtual ProblemType _getDualType() const;
+
+    virtual void _clear();
+
+    void _messageLevel(MessageLevel m);
+    void _applyMessageLevel();
+
+    int _message_level;
+
+  };
+
+} //END OF NAMESPACE LEMON
+
+#endif //LEMON_SOPLEX_H
+