--- /dev/null	
+++ scsolver/source/inc/numeric/type.hxx	
@@ -0,0 +1,68 @@
+/*************************************************************************
+ *
+ *  The Contents of this file are made available subject to
+ *  the terms of GNU Lesser General Public License Version 2.1.
+ *
+ *
+ *    GNU Lesser General Public License Version 2.1
+ *    =============================================
+ *    Copyright 2005 by Kohei Yoshida.
+ *    1039 Kingsway Dr., Apex, NC 27502, USA
+ *
+ *    This library is free software; you can redistribute it and/or
+ *    modify it under the terms of the GNU Lesser General Public
+ *    License version 2.1, as published by the Free Software Foundation.
+ *
+ *    This library is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *    Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public
+ *    License along with this library; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *    MA  02111-1307  USA
+ *
+ ************************************************************************/
+
+
+#ifndef _NUMERIC_TYPE_HXX_
+#define _NUMERIC_TYPE_HXX_
+
+namespace scsolver { namespace numeric { namespace opres {
+
+enum Equality
+{
+	/** [constraint] >= [rhs]
+	 */
+	GREATER_THAN_EQUAL,
+	/** [constraint] = [rhs]
+	 */
+	EQUAL,
+	/** [constraint] <= [rhs]
+	 */
+	LESS_THAN_EQUAL
+};
+
+/**
+ * Upper or lower boundary for a decision variable.
+ */
+enum Bound
+{
+	BOUND_UPPER,
+	BOUND_LOWER
+};
+
+/**
+ * Goal of an optimization model.
+ */
+enum Goal
+{
+	GOAL_MINIMIZE,
+	GOAL_MAXIMIZE,
+	GOAL_UNKNOWN
+};
+
+}}}
+
+#endif
