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diff --git a/lib/kformula/symboltable.h b/lib/kformula/symboltable.h
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+/* This file is part of the KDE project
+   Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org>
+	              Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
+   Copyright (C) 2006 Alfredo Beaumont Sainz <alfredo.beaumont@gmail.com>              
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+*/
+
+#ifndef SYMBOLTABLE_H
+#define SYMBOLTABLE_H
+
+#include <qfont.h>
+#include <qmap.h>
+#include <qstring.h>
+#include <qstringlist.h>
+#include <qvaluevector.h>
+
+#include "kformuladefs.h"
+
+class KConfig;
+
+KFORMULA_NAMESPACE_BEGIN
+
+class ContextStyle;
+struct UnicodeNameTable;
+
+/**
+ * We expect to always have the symbol font.
+ */
+class SymbolFontHelper {
+public:
+
+    SymbolFontHelper();
+
+    /**
+     * @returns a string with all greek letters.
+     */
+    QString greekLetters() const { return greek; }
+
+    /**
+     * @returns the unicode value of the symbol font char.
+     */
+    QChar unicodeFromSymbolFont( QChar pos ) const;
+
+private:
+
+    /**
+     * symbol font char -> unicode mapping.
+     */
+    QMap<QChar, QChar> compatibility;
+
+    /**
+     * All greek letters that are known.
+     */
+    QString greek;
+};
+
+
+/**
+ * The symbol table.
+ *
+ * It contains all names that are know to the system.
+ */
+class KOFORMULA_EXPORT SymbolTable {
+public:
+
+    SymbolTable();
+
+    /**
+     * lazy init support. Needs to be run before anything else.
+     * @param install if true fonts may be installed if needed
+     */
+    void init( const QFont& font );
+
+    bool contains( QString name ) const;
+
+    /**
+     * @returns the char in the symbol font that belongs to
+     * the given name.
+     */
+    QChar unicode( QString name ) const;
+    QString name( QChar symbol ) const;
+
+    QFont font( QChar symbol, const QFont& f ) const;
+
+    CharClass charClass( QChar symbol ) const;
+
+    /**
+     * @returns a string with all greek letters.
+     */
+    QString greekLetters() const;
+
+    /**
+     * @returns the unicode value of the symbol font char.
+     */
+    QChar unicodeFromSymbolFont( QChar pos ) const;
+
+    /**
+     * @returns all known names as strings.
+     */
+    QStringList allNames() const;
+
+    typedef QMap<QChar, QString> NameTable;
+    typedef QMap<QString, QChar> EntryTable;
+
+private:
+
+    QString get_name( UnicodeNameTable entry ) const;
+
+    /**
+     * unicode -> name mapping.
+     */
+    NameTable names;
+
+    /**
+     * Name -> unicode mapping.
+     */
+    EntryTable entries;
+
+    /**
+     * Basic symbol font support.
+     */
+    SymbolFontHelper symbolFontHelper;
+
+    /**
+     * Backup font for mathematical operators. We ensure that every symbol in
+     * this table is present in this font. If user selected font doesn't have
+     * the needed glyph this font will be used instead.
+     */
+    QFont backupFont;
+};
+
+KFORMULA_NAMESPACE_END
+
+#endif // SYMBOLTABLE_H