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diff --git a/svgio/inc/svgnode.hxx b/svgio/inc/svgnode.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SVGIO_INC_SVGNODE_HXX
+#define INCLUDED_SVGIO_INC_SVGNODE_HXX
+
+#include <svgtools.hxx>
+#include <svgtoken.hxx>
+#include <svgpaint.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <com/sun/star/xml/sax/XAttributeList.hpp>
+#include <vector>
+
+// predefines
+namespace svgio
+{
+    namespace svgreader
+    {
+        class SvgNode;
+        class SvgDocument;
+        class SvgStyleAttributes;
+    }
+}
+
+
+namespace svgio
+{
+    namespace svgreader
+    {
+        typedef ::std::vector< SvgNode* > SvgNodeVector;
+        typedef ::std::vector< const SvgStyleAttributes* > SvgStyleAttributeVector;
+
+        enum XmlSpace
+        {
+            XmlSpace_notset,
+            XmlSpace_default,
+            XmlSpace_preserve
+        };
+
+        // display property (see SVG 1.1. 11.5), not inheritable
+        enum Display // #i121656#
+        {
+            Display_inline, // the default
+            Display_block,
+            Display_list_item,
+            Display_run_in,
+            Display_compact,
+            Display_marker,
+            Display_table,
+            Display_inline_table,
+            Display_table_row_group,
+            Display_table_header_group,
+            Display_table_footer_group,
+            Display_table_row,
+            Display_table_column_group,
+            Display_table_column,
+            Display_table_cell,
+            Display_table_caption,
+            Display_none,
+            Display_inherit
+        };
+
+        // helper to convert a string associated with a token of type SVGTokenDisplay
+        // to the enum Display. Empty strings return the default 'Display_inline' with
+        // which members should be initialized
+        Display getDisplayFromContent(const OUString& aContent);
+
+        class SvgNode : public InfoProvider
+        {
+        private:
+            /// basic data, Type, document we belong to and parent (if not root)
+            SVGToken                    maType;
+            SvgDocument&                mrDocument;
+            const SvgNode*              mpParent;
+            const SvgNode*              mpAlternativeParent;
+
+            /// sub hierarchy
+            SvgNodeVector               maChildren;
+
+            /// Id svan value
+            OUString*              mpId;
+
+            /// Class svan value
+            OUString*              mpClass;
+
+            /// XmlSpace value
+            XmlSpace                    maXmlSpace;
+
+            /// Display value #i121656#
+            Display                     maDisplay;
+
+            // CSS style vector chain, used in decompose phase and built up once per node.
+            // It contains the StyleHierarchy for the local node. INdependent from the
+            // node hierarchy itself which also needs to be used in style entry solving
+            SvgStyleAttributeVector     maCssStyleVector;
+
+            /// possible local CssStyle, e.g. style="fill:red; stroke:red;"
+            SvgStyleAttributes*         mpLocalCssStyle;
+
+            /// bitfield
+            // flag if maCssStyleVector is already computed (done only once)
+            bool                        mbCssStyleVectorBuilt : 1;
+
+        protected:
+            /// helper to evtl. link to css style
+            const SvgStyleAttributes* checkForCssStyle(const OUString& rClassStr, const SvgStyleAttributes& rOriginal) const;
+
+            /// helper for filling the CssStyle vector once dependent on mbCssStyleVectorBuilt
+            void fillCssStyleVector(const OUString& rClassStr, const SvgStyleAttributes& rOriginal);
+            void fillCssStyleVectorUsingHierarchyAndSelectors(
+                const OUString& rClassStr,
+                const SvgNode& rCurrent,
+                const OUString& aConcatenated);
+
+        public:
+            SvgNode(
+                SVGToken aType,
+                SvgDocument& rDocument,
+                SvgNode* pParent);
+            virtual ~SvgNode();
+            SvgNode(const SvgNode&) = delete;
+            SvgNode& operator=(const SvgNode&) = delete;
+
+            /// scan helper to read and interpret a local CssStyle to mpLocalCssStyle
+            void readLocalCssStyle(const OUString& aContent);
+
+            /// style helpers
+            void parseAttributes(const css::uno::Reference< css::xml::sax::XAttributeList >& xAttribs);
+            virtual const SvgStyleAttributes* getSvgStyleAttributes() const;
+            virtual void parseAttribute(const OUString& rTokenName, SVGToken aSVGToken, const OUString& aContent);
+            virtual void decomposeSvgNode(drawinglayer::primitive2d::Primitive2DContainer& rTarget, bool bReferenced) const;
+
+            /// #i125258# tell if this node is allowed to have a parent style (e.g. defs do not)
+            virtual bool supportsParentStyle() const;
+
+            /// basic data read access
+            SVGToken getType() const { return maType; }
+            const SvgDocument& getDocument() const { return mrDocument; }
+            const SvgNode* getParent() const { if(mpAlternativeParent) return mpAlternativeParent; return mpParent; }
+            const SvgNodeVector& getChildren() const { return maChildren; }
+
+            /// InfoProvider support for %, em and ex values
+            virtual const basegfx::B2DRange getCurrentViewPort() const override;
+            virtual double getCurrentFontSizeInherited() const override;
+            virtual double getCurrentXHeightInherited() const override;
+
+            virtual double getCurrentFontSize() const;
+            double getCurrentXHeight() const;
+
+            /// Id access
+            const OUString* getId() const { return mpId; }
+            void setId(const OUString* pfId = nullptr);
+
+            /// Class access
+            const OUString* getClass() const { return mpClass; }
+            void setClass(const OUString* pfClass = nullptr);
+
+            /// XmlSpace access
+            XmlSpace getXmlSpace() const;
+            void setXmlSpace(XmlSpace eXmlSpace = XmlSpace_notset) { maXmlSpace = eXmlSpace; }
+
+            /// Display access #i121656#
+            Display getDisplay() const { return maDisplay; }
+            void setDisplay(Display eDisplay = Display_inherit) { maDisplay = eDisplay; }
+
+            /// alternative parent
+            void setAlternativeParent(const SvgNode* pAlternativeParent = nullptr) { mpAlternativeParent = pAlternativeParent; }
+        };
+    } // end of namespace svgreader
+} // end of namespace svgio
+
+#endif // INCLUDED_SVGIO_INC_SVGNODE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */