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diff --git a/kabc/formatplugin.h b/kabc/formatplugin.h
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+++ b/kabc/formatplugin.h
@@ -0,0 +1,73 @@
+/*
+    This file is part of libkabc.
+    Copyright (c) 2002 Tobias Koenig <tokoe@kde.org>
+
+    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 KABC_FORMATPLUGIN_H
+#define KABC_FORMATPLUGIN_H
+
+#include <qfile.h>
+
+#include "plugin.h"
+#include "resource.h"
+
+namespace KABC {
+
+class AddressBook;
+class Addressee;
+
+/**
+ * @short Base class for address book formats.
+ *
+ * This class provides an abstract interface for ResourceFile and
+ * ResourceDir formats.
+ *
+ * @internal
+ */
+class KABC_EXPORT FormatPlugin : public Plugin
+{
+public:
+
+  /**
+   * Load single addressee from file.
+   */
+  virtual bool load( Addressee &, QFile *file ) = 0;
+
+  /**
+   * Load whole addressbook from file.
+   */
+  virtual bool loadAll( AddressBook *, Resource *, QFile *file ) = 0;
+
+  /**
+   * Save a single Addressee to file.
+   */
+  virtual void save( const Addressee &, QFile *file ) = 0;
+    
+  /**
+   * Save whole addressbook to file.
+   */
+  virtual void saveAll( AddressBook *, Resource *, QFile *file ) = 0;
+    
+  /**
+   * Checks if given file contains the right format
+   */
+  virtual bool checkFormat( QFile *file ) const = 0;
+};
+
+}
+#endif