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diff --git a/raslib/oid.hh b/raslib/oid.hh
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+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Rasdaman community 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+/
+/**
+ * INCLUDE: oid.hh
+ *
+ * MODULE:  raslib
+ * CLASS:   r_OId
+ *
+ * COMMENTS:
+ * 		The class represents an object identifier (OId).
+ *
+*/
+
+#ifndef _D_OID_
+#define _D_OID_
+
+#include <iosfwd>
+
+//@ManMemo: Module: {\bf raslib}
+
+/*@Doc:
+
+ Class \Ref{r_OId} represents an object identifier.
+ 
+*/
+ 
+class r_OId
+{
+  public:
+    /// default constructor
+    r_OId();
+ 
+    /// constructs an OId from the string representation
+    r_OId( const char* );
+
+    /// constructor getting oid parts
+    r_OId( const char* initSystemName, const char* initBaseName, double initLocalOId );
+
+    /// copy constructor
+    r_OId( const r_OId& );
+
+    /// destructor
+    virtual ~r_OId();
+
+    /// it is called when an object leaves transient memory
+    virtual void r_deactivate();
+
+    /// debug output
+    void print_status(std::ostream& s) const;
+
+    /// operator for assigning an oid
+    const r_OId& operator= ( const r_OId& );
+
+    //@Man: Comparison operators:
+    //@{
+    ///
+
+      /// operator for equality
+      bool operator==( const r_OId& ) const;
+
+      /// operator for not equal
+      bool operator!=( const r_OId& ) const;
+
+      /// operator for greater than
+      bool operator> ( const r_OId& ) const;
+
+      /// operator for less than
+      bool operator< ( const r_OId& ) const;
+
+      /// operator for greater or equal than
+      bool operator>=( const r_OId& ) const;
+
+      /// operator for less than or equal
+      bool operator<=( const r_OId& ) const;
+
+    ///
+    //@}
+
+    /// gets the oid's string representation 
+    inline const char* get_string_representation() const;
+
+    /// get system name
+    inline const char* get_system_name() const;
+
+    /// get base name
+    inline const char* get_base_name() const;
+
+    /// get local oid
+    inline double get_local_oid() const;
+
+    /// determines if oid is valid
+    inline bool is_valid() const;
+
+  private:
+    /// string representation
+    char* oidString;
+
+    /// system name
+    char* systemName;
+
+    /// base name
+    char* baseName;
+
+    /// local oid
+    double localOId;
+};
+
+
+
+//@ManMemo: Module: {\bf raslib}
+/**
+  Output stream operator for objects of type {\tt const} \Ref{r_Oid}.
+*/  
+extern std::ostream& operator<<( std::ostream& s, const r_OId& oid );
+
+#include "raslib/oid.icc"
+#endif