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diff --git a/drawinglayer/inc/drawinglayer/primitive2d/groupprimitive2d.hxx b/drawinglayer/inc/drawinglayer/primitive2d/groupprimitive2d.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
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+ * only, as published by the Free Software Foundation.
+ *
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
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+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_DRAWINGLAYER_PRIMITIVE2D_GROUPPRIMITIVE2D_HXX
+#define INCLUDED_DRAWINGLAYER_PRIMITIVE2D_GROUPPRIMITIVE2D_HXX
+
+#include <drawinglayer/primitive2d/baseprimitive2d.hxx>
+
+//////////////////////////////////////////////////////////////////////////////
+// GroupPrimitive2D class
+
+namespace drawinglayer
+{
+    namespace primitive2d
+    {
+        /** GroupPrimitive2D class
+
+            Baseclass for all grouping 2D primitives
+
+            The grouping primitive in it's basic form is capable of holding
+            a child primitive content and returns it on decomposition on default.
+            It is used for two main purposes, but more may apply:
+
+            - to transport extended information, e.g. for text classification,
+              see e.g. TextHierarchy*Primitive2D implementations. Since they
+              decompose to their child content, renderers not aware/interested
+              in that extra information will just ignore these primitives
+
+            - to encapsulate common geometry, e.g. the ShadowPrimitive2D implements
+              applying a generic shadow to a child sequence by adding the needed
+              offset and color stuff in the decomposition
+
+            In most cases the decomposition is straightforward, so by default
+            this primitive will not buffer the result and is not derived from
+            BufferedDecompositionPrimitive2D, but from BasePrimitive2D.
+
+            A renderer has to take GroupPrimitive2D derivations into account which
+            are used to hold a state.
+
+            Current Basic 2D StatePrimitives are:
+
+            - TransparencePrimitive2D (objects with freely defined transparence)
+            - InvertPrimitive2D (for XOR)
+            - MaskPrimitive2D (for masking)
+            - ModifiedColorPrimitive2D (for a stack of color modifications)
+            - TransformPrimitive2D (for a transformation stack)
+         */
+        class GroupPrimitive2D : public BasePrimitive2D
+        {
+        private:
+            /// the children. Declared private since this shall never be changed at all after construction
+            Primitive2DSequence                             maChildren;
+
+        public:
+            /// constructor
+            GroupPrimitive2D(const Primitive2DSequence& rChildren);
+
+            /// data read access
+            const Primitive2DSequence& getChildren() const { return maChildren; }
+
+            /// compare operator
+            virtual bool operator==( const BasePrimitive2D& rPrimitive ) const;
+
+            /// local decomposition. Implementation will just return children
+            virtual Primitive2DSequence get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const;
+
+            /// provide unique ID
+            DeclPrimitrive2DIDBlock()
+        };
+    } // end of namespace primitive2d
+} // end of namespace drawinglayer
+
+//////////////////////////////////////////////////////////////////////////////
+
+#endif //INCLUDED_DRAWINGLAYER_PRIMITIVE2D_GROUPPRIMITIVE2D_HXX
+
+//////////////////////////////////////////////////////////////////////////////
+// eof