Add mathml structures

Change-Id: I8324456b9a6775842f39e984c569c068381dc952
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/112593
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

7 files changed, 1478 insertions, 0 deletions

diff --git a/starmath/Library_sm.mk b/starmath/Library_sm.mk
index 89f9f34c59bf..2e3cc035ec5f 100644
--- a/starmath/Library_sm.mk
+++ b/starmath/Library_sm.mk
@@ -103,6 +103,9 @@ $(eval $(call gb_Library_add_exception_objects,sm,\
         starmath/source/mathml/mathmlexport \
         starmath/source/mathml/mathmlimport \
         starmath/source/mathml/mathmlMo \
+        starmath/source/mathml/attribute \
+        starmath/source/mathml/element \
+        starmath/source/mathml/def \
         starmath/source/mathml/starmathdatabase \
 ))
 
diff --git a/starmath/inc/mathml/attribute.hxx b/starmath/inc/mathml/attribute.hxx
new file mode 100644
index 000000000000..c30053c9d037
--- /dev/null
+++ b/starmath/inc/mathml/attribute.hxx
@@ -0,0 +1,190 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include "def.hxx"
+
+/* All possible data needed to do the job outside mathml limits */
+// Ml prefix means it is part of mathml standar
+// NMl means it is not part of mathml standar but needed info to work
+
+/* Union for storing the mathml attribute value */
+/*************************************************************************************************/
+
+union SmMlAttributeValue {
+    SmMlAttributeValue(){};
+
+    struct SmMlAccent m_aAccent;
+    struct SmMlDir m_aDir;
+    struct SmMlDisplaystyle m_aDisplaystyle;
+    struct SmMlFence m_aFence;
+    struct SmMlHref m_aHref;
+    struct SmMlLspace m_aLspace;
+    struct SmMlMathbackground m_aMathbackground;
+    struct SmMlMathcolor m_aMathcolor;
+    struct SmMlMathsize m_aMathsize;
+    struct SmMlMathvariant m_aMathvariant;
+    struct SmMlMaxsize m_aMaxsize;
+    struct SmMlMinsize m_aMinsize;
+    struct SmMlMovablelimits m_aMovablelimits;
+    struct SmMlRspace m_aRspace;
+    struct SmMlSeparator m_aSeparator;
+    struct SmMlStretchy m_aStretchy;
+    struct SmMlSymmetric m_aSymmetric;
+};
+
+/* Class managing the attribute value */
+/*************************************************************************************************/
+
+class SmMlAttribute
+{
+private:
+    SmMlAttributeValueType m_aSmMlAttributeValueType;
+    SmMlAttributeValue m_aAttributeValue;
+
+private:
+    void clearPreviousAttributeValue();
+    void setDefaultAttributeValue();
+    void setAttributeValue(const SmMlAttribute* aMlAttribute);
+
+public:
+    SmMlAttribute() { m_aSmMlAttributeValueType = SmMlAttributeValueType::NMlEmpty; };
+
+    virtual ~SmMlAttribute() { clearPreviousAttributeValue(); };
+
+    SmMlAttribute(SmMlAttributeValueType)
+    {
+        m_aSmMlAttributeValueType = SmMlAttributeValueType::NMlEmpty;
+        setDefaultAttributeValue();
+    };
+
+    SmMlAttribute(const SmMlAttribute& aMlAttribute)
+    {
+        m_aSmMlAttributeValueType = SmMlAttributeValueType::NMlEmpty;
+        setAttributeValue(&aMlAttribute);
+    }
+
+    SmMlAttribute(const SmMlAttribute* aMlAttribute)
+    {
+        m_aSmMlAttributeValueType = SmMlAttributeValueType::NMlEmpty;
+        setAttributeValue(aMlAttribute);
+    }
+
+public:
+    /**
+      * Returns the type of attribute we are dealing with.
+      * Attribute Value Type
+      */
+    SmMlAttributeValueType getMlAttributeValueType() const { return m_aSmMlAttributeValueType; };
+
+    /**
+      * Checks if the attribute contains information.
+      * Attribute Value Type
+      */
+    bool isNullAttribute() const
+    {
+        return m_aSmMlAttributeValueType == SmMlAttributeValueType::NMlEmpty;
+    };
+
+    /**
+      * Compares the type of attribute with a given one.
+      * Attribute Value Type
+      */
+    bool isMlAttributeValueType(SmMlAttributeValueType aAttributeValueType) const
+    {
+        return m_aSmMlAttributeValueType == aAttributeValueType;
+    };
+
+    /**
+      * Set the type of attribute we are dealing with.
+      * @param Attribute Value Type
+      */
+    void setMlAttributeValueType(SmMlAttributeValueType aAttributeValueType)
+    {
+        clearPreviousAttributeValue();
+        m_aSmMlAttributeValueType = aAttributeValueType;
+        setDefaultAttributeValue();
+    }
+
+    void setMlAttributeValue(const SmMlAttribute& aMlAttribute)
+    {
+        setAttributeValue(&aMlAttribute);
+    }
+
+    void setMlAttributeValue(const SmMlAttribute* aMlAttribute) { setAttributeValue(aMlAttribute); }
+
+public:
+    // Get values
+    const struct SmMlAccent* getMlAccent() const;
+    const struct SmMlDir* getMlDir() const;
+    const struct SmMlDisplaystyle* getMlDisplaystyle() const;
+    const struct SmMlFence* getMlFence() const;
+    const struct SmMlHref* getMlHref() const;
+    const struct SmMlLspace* getMlLspace() const;
+    const struct SmMlMathbackground* getMlMathbackground() const;
+    const struct SmMlMathcolor* getMlMathcolor() const;
+    const struct SmMlMathsize* getMlMathsize() const;
+    const struct SmMlMathvariant* getMlMathvariant() const;
+    const struct SmMlMaxsize* getMlMaxsize() const;
+    const struct SmMlMinsize* getMlMinsize() const;
+    const struct SmMlMovablelimits* getMlMovablelimits() const;
+    const struct SmMlRspace* getMlRspace() const;
+    const struct SmMlSeparator* getMlSeparator() const;
+    const struct SmMlStretchy* getMlStretchy() const;
+    const struct SmMlSymmetric* getMlSymmetric() const;
+
+    // Set values
+    // Note that content is copied.
+    void setMlAccent(const SmMlAccent* aAccent);
+    void setMlDir(const SmMlDir* aDir);
+    void setMlDisplaystyle(const SmMlDisplaystyle* aDisplaystyle);
+    void setMlFence(const SmMlFence* aFence);
+    void setMlHref(const SmMlHref* aHref);
+    void setMlLspace(const SmMlLspace* aLspace);
+    void setMlMathbackground(const SmMlMathbackground* aMathbackground);
+    void setMlMathcolor(const SmMlMathcolor* aMathcolor);
+    void setMlMathsize(const SmMlMathsize* aMathsize);
+    void setMlMathvariant(const SmMlMathvariant* aMathvariant);
+    void setMlMaxsize(const SmMlMaxsize* aMaxsize);
+    void setMlMinsize(const SmMlMinsize* aMinSize);
+    void setMlMovablelimits(const SmMlMovablelimits* aMovablelimits);
+    void setMlRspace(const SmMlRspace* aRspace);
+    void setMlSeparator(const SmMlSeparator* aSeparator);
+    void setMlStretchy(const SmMlStretchy* aStretchy);
+    void setMlSymmetric(const SmMlSymmetric* aSymmetric);
+};
+
+/* element's attributes */
+/*************************************************************************************************/
+
+namespace starmathdatabase
+{
+extern SmMlAttributePos MlAttributeListEmpty[1];
+extern SmMlAttributePos MlAttributeListMath[1];
+extern SmMlAttributePos MlAttributeListMi[7];
+extern SmMlAttributePos MlAttributeListMerror[4];
+extern SmMlAttributePos MlAttributeListMn[7];
+extern SmMlAttributePos MlAttributeListMo[17];
+extern SmMlAttributePos MlAttributeListMrow[4];
+extern SmMlAttributePos MlAttributeListMtext[7];
+extern SmMlAttributePos MlAttributeListMstyle[17];
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/starmath/inc/mathml/def.hxx b/starmath/inc/mathml/def.hxx
new file mode 100644
index 000000000000..6fccf79d6fab
--- /dev/null
+++ b/starmath/inc/mathml/def.hxx
@@ -0,0 +1,333 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <tools/color.hxx>
+
+/* All possible data needed to do the job outside mathml limits */
+// Ml prefix means it is part of mathml standar
+// NMl means it is not part of mathml standar but needed info to work
+
+/* For now empty, don't know yet what's needed besides default font size. */
+struct SmGlobalData
+{
+};
+
+/* Mthml length tools */
+/*************************************************************************************************/
+
+enum class SmLengthUnit : uint_fast8_t
+{
+    MlEm,
+    MlEx,
+    MlPx,
+    MlIn,
+    MlCm,
+    MlMM,
+    MlPt,
+    MlPc,
+    MlP // Percent
+};
+
+struct SmLengthValue
+{
+    SmLengthUnit m_aLengthUnit;
+    double m_aLengthValue;
+    // Keeps original text value to avoid numerial error data loss
+    OUString* m_aOriginalText;
+};
+
+/* Possible mathml elements */
+/*************************************************************************************************/
+
+enum class SmMlElementType : uint_fast8_t
+{
+    // Used for base element. Means no information contained.
+    NMlEmpty,
+    // Used for structural dependencies. Means no information contained.
+    NMlStructural,
+    NMlSmNode,
+    // Mathml real elements
+    MlMath,
+    MlMi,
+    MlMerror,
+    MlMn,
+    MlMo,
+    MlMrow,
+    MlMtext,
+    MlMstyle
+};
+
+/* Possible mathml attributes */
+/*************************************************************************************************/
+
+enum class SmMlAttributeValueType : uint_fast8_t
+{
+    NMlEmpty,
+    MlAccent,
+    MlDir,
+    MlDisplaystyle,
+    MlFence,
+    MlHref,
+    MlLspace,
+    MlMathbackground,
+    MlMathcolor,
+    MlMathsize,
+    MlMathvariant,
+    MlMaxsize,
+    MlMinsize,
+    MlMovablelimits,
+    MlRspace,
+    MlSeparator,
+    MlStretchy,
+    MlSymmetric
+};
+
+/* Possible values of mathml attributes */
+/*************************************************************************************************/
+
+enum class SmMlAttributeValueEmpty : uint_fast8_t
+{
+    MlEmpty = 0x00
+};
+
+enum class SmMlAttributeValueAccent : uint_fast8_t
+{
+    MlFalse = 0x00,
+    MlTrue = 0x01
+};
+
+enum class SmMlAttributeValueDir : uint_fast8_t
+{
+    MlLtr = 0x00,
+    MlRtl = 0x01
+};
+
+enum class SmMlAttributeValueDisplaystyle : uint_fast8_t
+{
+    MlFalse = 0x00,
+    MlTrue = 0x01
+};
+
+enum class SmMlAttributeValueFence : uint_fast8_t
+{
+    MlFalse = 0x00,
+    MlTrue = 0x01
+};
+
+enum class SmMlAttributeValueHref : uint_fast8_t
+{
+    NMlEmpty = 0x00,
+    NMlValie = 0x01
+};
+
+enum class SmMlAttributeValueLspace : uint_fast8_t
+{
+    NMlEmpty = 0x00
+};
+
+enum class SmMlAttributeValueMathbackground : uint_fast32_t
+{
+    MlTransparent = 0x00,
+    MlRgb = 0x01
+};
+
+enum class SmMlAttributeValueMathcolor : uint_fast8_t
+{
+    MlDefault = 0x00,
+    MlRgb = 0x01
+};
+
+enum class SmMlAttributeValueMathsize : uint_fast8_t
+{
+    NMlEmpty = 0x00,
+};
+
+enum class SmMlAttributeValueMathvariant : uint_fast16_t
+{
+    normal = 0x000,
+    bold = 0x001,
+    italic = 0x002,
+    double_struck = 0x004,
+    script = 0x008,
+    fraktur = 0x010,
+    sans_serif = 0x020,
+    monospace = 0x040,
+    bold_italic = 0x001 | 0x002,
+    bold_fraktur = 0x001 | 0x010,
+    bold_script = 0x001 | 0x008,
+    bold_sans_serif = 0x001 | 0x020,
+    sans_serif_italic = 0x001 | 0x002 | 0x20,
+    sans_serif_bold_italic = 0x001 | 0x002 | 0x020,
+    // Non english
+    initial = 0x080,
+    tailed = 0x100,
+    looped = 0x200,
+    stretched = 0x400
+};
+
+enum class SmMlAttributeValueMaxsize : uint_fast8_t
+{
+    MlInfinity = 0x00,
+    MlFinite = 0x01
+};
+
+enum class SmMlAttributeValueMinsize : uint_fast8_t
+{
+    MlInfinity = 0x00,
+    MlFinite = 0x01
+};
+
+/*
+ * Specifies whether attached under- and overscripts move to sub- and superscript positions when displaystyle is false.
+ * Source: https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mo
+ */
+enum class SmMlAttributeValueMovablelimits : uint_fast8_t
+{
+    MlFalse = 0x00,
+    MlTrue = 0x01
+};
+
+enum class SmMlAttributeValueRspace : uint_fast8_t
+{
+    NMlEmpty = 0x00
+};
+
+enum class SmMlAttributeValueSeparator : uint_fast8_t
+{
+    MlFalse = 0x00,
+    MlTrue = 0x01
+};
+
+enum class SmMlAttributeValueStretchy : uint_fast8_t
+{
+    MlFalse = 0x00,
+    MlTrue = 0x01
+};
+
+enum class SmMlAttributeValueSymmetric : uint_fast8_t
+{
+    MlFalse = 0x00,
+    MlTrue = 0x01
+};
+
+/* Structures for all possible attributes */
+/*************************************************************************************************/
+
+struct SmMlAccent
+{
+    SmMlAttributeValueAccent m_aAccent;
+};
+
+struct SmMlDir
+{
+    SmMlAttributeValueDir m_aDir;
+};
+
+struct SmMlDisplaystyle
+{
+    SmMlAttributeValueDisplaystyle m_aDisplaystyle;
+};
+
+struct SmMlFence
+{
+    SmMlAttributeValueFence m_aFence;
+};
+
+struct SmMlHref
+{
+    SmMlAttributeValueHref m_aHref;
+    OUString* m_aLnk;
+};
+
+struct SmMlLspace
+{
+    SmLengthValue m_aLengthValue;
+};
+
+struct SmMlMathbackground
+{
+    SmMlAttributeValueMathbackground m_aMathbackground;
+    Color m_aCol;
+};
+
+struct SmMlMathcolor
+{
+    SmMlAttributeValueMathcolor m_aMathcolor;
+    Color m_aCol;
+};
+
+struct SmMlMathsize
+{
+    SmLengthValue m_aLengthValue;
+};
+
+struct SmMlMathvariant
+{
+    SmMlAttributeValueMathvariant m_aMathvariant;
+};
+
+struct SmMlMaxsize
+{
+    SmMlAttributeValueMaxsize m_aMaxsize;
+    SmLengthValue m_aLengthValue;
+};
+
+struct SmMlMinsize
+{
+    SmMlAttributeValueMinsize m_aMinsize;
+    SmLengthValue m_aLengthValue;
+};
+
+struct SmMlMovablelimits
+{
+    SmMlAttributeValueMovablelimits m_aMovablelimits;
+};
+
+struct SmMlRspace
+{
+    SmLengthValue m_aLengthValue;
+};
+
+struct SmMlSeparator
+{
+    SmMlAttributeValueSeparator m_aSeparator;
+};
+
+struct SmMlStretchy
+{
+    SmMlAttributeValueStretchy m_aStretchy;
+};
+
+struct SmMlSymmetric
+{
+    SmMlAttributeValueSymmetric m_aSymmetric;
+};
+
+/* order attributes */
+/*************************************************************************************************/
+
+struct SmMlAttributePos
+{
+    SmMlAttributeValueType m_aAttributeValueType;
+    uint_fast8_t m_nPos;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/starmath/inc/mathml/element.hxx b/starmath/inc/mathml/element.hxx
new file mode 100644
index 000000000000..e58506077e33
--- /dev/null
+++ b/starmath/inc/mathml/element.hxx
@@ -0,0 +1,236 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include "attribute.hxx"
+#include <rect.hxx>
+
+#include <editeng/editdata.hxx>
+
+class SmMlElement : public SmRect
+{
+    /* Technical stuff */
+
+public:
+    SmMlElement()
+        : m_aElementType(SmMlElementType::NMlEmpty)
+        , m_aText(u"")
+        , m_aESelection(0, 0, 0, 0)
+        , m_aAttributeList(0)
+        , m_aAttributePosList(0)
+        , m_aSubElements(0)
+        , m_aParentElement(nullptr)
+    {
+        SmImplAttributeType();
+    };
+    /* Mathml stuff */
+
+protected:
+    SmMlElement(SmMlElementType aElementType)
+        : m_aElementType(aElementType)
+        , m_aText(u"\u00B6")
+        , m_aESelection(0, 0, 0, 0)
+        , m_aSubElements(0)
+        , m_aParentElement(nullptr)
+    {
+        SmImplAttributeType();
+    };
+
+private:
+    // Type of element
+    SmMlElementType m_aElementType;
+
+    // Element text
+    OUString m_aText;
+
+    // Location in source code
+    ESelection m_aESelection;
+
+    // Attribute list
+    std::vector<SmMlAttribute> m_aAttributeList;
+
+    // Attribute position list
+    std::vector<SmMlAttributePos> m_aAttributePosList;
+
+    // Sub elements
+    std::vector<SmMlElement*> m_aSubElements;
+
+    // Parent element
+    SmMlElement* m_aParentElement;
+
+private:
+    void SmImplAttributeType();
+
+public: // Element type
+    /**
+      * Returns the mathml element type
+      * @return mathml element type
+      */
+    SmMlElementType getMlElementType() const { return m_aElementType; };
+
+    /**
+      * Check if the mathml element is of a given type
+      * @param aElementType
+      * @return is mathml element type
+      */
+    bool isMlElementType(SmMlElementType aElementType) const
+    {
+        return m_aElementType == aElementType;
+    };
+
+public: // location in the source
+    /**
+      * Returns the location in the source code of the node type
+      * @return selection
+      */
+    ESelection getESelection() const { return m_aESelection; };
+
+    /**
+      * Sets the location in the source code of the node type
+      * @param aESelection
+      */
+    void setESelection(ESelection aESelection) { m_aESelection = aESelection; };
+
+    /**
+      * Gets the line in the text where the node is located.
+      * It is used to do the visual <-> text correspondence.
+      * @return line
+      */
+    sal_Int32 GetSourceCodeRow() const { return m_aESelection.nStartPara; }
+
+    /**
+      * Gets the column of the line in the text where the node is located.
+      * It is used to do the visual <-> text correspondence.
+      * @return column
+      */
+    sal_Int32 GetSourceCodeColumn() const { return m_aESelection.nStartPos; }
+
+public: // attributes
+    /**
+      * Returns the amount of available attributes
+      * @return attribute count
+      */
+    size_t getAttributeCount() const { return m_aAttributeList.size(); };
+
+    /**
+      * Get's a given attribute.
+      * If no available returns empty attribute.
+      * @param nAttributePos
+      * @return given attribute.
+      */
+    SmMlAttribute getAttribute(size_t nAttributePos) const
+    {
+        return nAttributePos < m_aAttributeList.size() ? m_aAttributeList[nAttributePos]
+                                                       : SmMlAttribute();
+    }
+
+    /**
+      * Get's a given attribute.
+      * If no available returns empty attribute.
+      * @param nAttributePos
+      * @return given attribute.
+      */
+    SmMlAttribute getAttribute(SmMlAttributeValueType aElementType) const;
+
+    /**
+      * Set's a given attribute.
+      * If no available does nothing.
+      * @param nAttributePos
+      * @return given attribute.
+      */
+    void setAttribute(const SmMlAttribute* aAttribute);
+
+public: // sub elements
+    /**
+      * Returns the sub elements count
+      * @return sub elements count
+      */
+    size_t getSubElementsCount() const { return m_aSubElements.size(); };
+
+    /**
+      * Returns a given sub element
+      * @param nPos
+      * @return sub elements
+      */
+    SmMlElement* getSubElement(size_t nPos)
+    {
+        return nPos < m_aSubElements.size() ? m_aSubElements[nPos] : nullptr;
+    };
+
+    /**
+      * Returns a given sub element
+      * @param nPos
+      * @return sub elements
+      */
+    const SmMlElement* getSubElement(size_t nPos) const
+    {
+        return nPos < m_aSubElements.size() ? m_aSubElements[nPos] : nullptr;
+    };
+
+    /**
+      * Sets a given sub element
+      * @param nPos
+      * @param aElement
+      */
+    void setSubElement(size_t nPos, SmMlElement* aElement);
+
+public: // parent elements
+    /**
+      * Returns the parent element
+      * @return parent element
+      */
+    SmMlElement* getParentElement() { return m_aParentElement; };
+
+    /**
+      * Returns the parent element
+      * @return parent element
+      */
+    const SmMlElement* getParentElement() const { return m_aParentElement; };
+
+    /**
+      * Sets the parent element
+      * No allocation / free is done.
+      * @param aParentElement
+      */
+    void setParentElement(SmMlElement* aParentElement) { m_aParentElement = aParentElement; };
+
+public: // text elements
+    /**
+      * Returns the element text
+      */
+    OUString getText() const { return m_aText; };
+
+    /**
+      * Returns the element text
+      */
+    void setText(OUString aText) { m_aText = aText; };
+};
+
+namespace starmathdatabase
+{
+/**
+  * Generates an attribute vector of default values from an attribute position list.
+  * @param aAttributePosList
+  * @return attribute vector
+  */
+std::vector<SmMlAttribute> makeMlAttributeList(std::vector<SmMlAttributePos> aAttributePosList);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/starmath/source/mathml/attribute.cxx b/starmath/source/mathml/attribute.cxx
new file mode 100644
index 000000000000..dac917de9874
--- /dev/null
+++ b/starmath/source/mathml/attribute.cxx
@@ -0,0 +1,450 @@
+/* -*- 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 .
+ */
+
+#include <mathml/attribute.hxx>
+
+void SmMlAttribute::clearPreviousAttributeValue()
+{
+    switch (m_aSmMlAttributeValueType)
+    {
+        case SmMlAttributeValueType::NMlEmpty:
+            break;
+        case SmMlAttributeValueType::MlHref:
+            if (m_aAttributeValue.m_aHref.m_aLnk)
+                delete m_aAttributeValue.m_aHref.m_aLnk;
+            break;
+        case SmMlAttributeValueType::MlLspace:
+            if (m_aAttributeValue.m_aLspace.m_aLengthValue.m_aOriginalText)
+                delete m_aAttributeValue.m_aLspace.m_aLengthValue.m_aOriginalText;
+            break;
+        case SmMlAttributeValueType::MlMathsize:
+            if (m_aAttributeValue.m_aMathsize.m_aLengthValue.m_aOriginalText)
+                delete m_aAttributeValue.m_aMathsize.m_aLengthValue.m_aOriginalText;
+            break;
+        case SmMlAttributeValueType::MlMaxsize:
+            if (m_aAttributeValue.m_aMaxsize.m_aLengthValue.m_aOriginalText)
+                delete m_aAttributeValue.m_aMaxsize.m_aLengthValue.m_aOriginalText;
+            break;
+        case SmMlAttributeValueType::MlMinsize:
+            if (m_aAttributeValue.m_aMinsize.m_aLengthValue.m_aOriginalText)
+                delete m_aAttributeValue.m_aMinsize.m_aLengthValue.m_aOriginalText;
+            break;
+        case SmMlAttributeValueType::MlRspace:
+            if (m_aAttributeValue.m_aRspace.m_aLengthValue.m_aOriginalText)
+                delete m_aAttributeValue.m_aRspace.m_aLengthValue.m_aOriginalText;
+            break;
+        default:
+            break;
+    }
+}
+
+void SmMlAttribute::setDefaultAttributeValue()
+{
+    switch (m_aSmMlAttributeValueType)
+    {
+        case SmMlAttributeValueType::NMlEmpty:
+            break;
+        case SmMlAttributeValueType::MlAccent:
+            m_aAttributeValue.m_aAccent.m_aAccent = SmMlAttributeValueAccent::MlFalse;
+            break;
+        case SmMlAttributeValueType::MlDir:
+            m_aAttributeValue.m_aDir.m_aDir = SmMlAttributeValueDir::MlLtr;
+            break;
+        case SmMlAttributeValueType::MlDisplaystyle:
+            m_aAttributeValue.m_aDisplaystyle.m_aDisplaystyle
+                = SmMlAttributeValueDisplaystyle::MlFalse;
+            break;
+        case SmMlAttributeValueType::MlFence:
+            m_aAttributeValue.m_aFence.m_aFence = SmMlAttributeValueFence::MlFalse;
+            break;
+        case SmMlAttributeValueType::MlHref:
+            m_aAttributeValue.m_aHref.m_aHref = SmMlAttributeValueHref::NMlEmpty;
+            m_aAttributeValue.m_aHref.m_aLnk = new OUString(u"");
+            break;
+        case SmMlAttributeValueType::MlLspace:
+            m_aAttributeValue.m_aLspace.m_aLengthValue.m_aLengthUnit = SmLengthUnit::MlEm;
+            m_aAttributeValue.m_aLspace.m_aLengthValue.m_aLengthValue = 5.0 / 18;
+            m_aAttributeValue.m_aLspace.m_aLengthValue.m_aOriginalText = new OUString(u"5/18em");
+            break;
+        case SmMlAttributeValueType::MlMathbackground:
+            m_aAttributeValue.m_aMathbackground.m_aMathbackground
+                = SmMlAttributeValueMathbackground::MlTransparent;
+            break;
+        case SmMlAttributeValueType::MlMathcolor:
+            m_aAttributeValue.m_aMathcolor.m_aMathcolor = SmMlAttributeValueMathcolor::MlDefault;
+            break;
+        case SmMlAttributeValueType::MlMathsize:
+            m_aAttributeValue.m_aMathsize.m_aLengthValue.m_aLengthUnit = SmLengthUnit::MlP;
+            m_aAttributeValue.m_aMathsize.m_aLengthValue.m_aLengthValue = 100;
+            m_aAttributeValue.m_aMathsize.m_aLengthValue.m_aOriginalText = new OUString(u"100%");
+            break;
+        case SmMlAttributeValueType::MlMathvariant:
+            m_aAttributeValue.m_aMathvariant.m_aMathvariant = SmMlAttributeValueMathvariant::normal;
+            break;
+        case SmMlAttributeValueType::MlMaxsize:
+            m_aAttributeValue.m_aMaxsize.m_aMaxsize = SmMlAttributeValueMaxsize::MlInfinity;
+            m_aAttributeValue.m_aMaxsize.m_aLengthValue.m_aLengthUnit = SmLengthUnit::MlP;
+            m_aAttributeValue.m_aMaxsize.m_aLengthValue.m_aLengthValue = 10000;
+            m_aAttributeValue.m_aMaxsize.m_aLengthValue.m_aOriginalText = new OUString(u"10000%");
+            break;
+        case SmMlAttributeValueType::MlMinsize:
+            m_aAttributeValue.m_aMinsize.m_aMinsize = SmMlAttributeValueMinsize::MlInfinity;
+            m_aAttributeValue.m_aMinsize.m_aLengthValue.m_aLengthUnit = SmLengthUnit::MlP;
+            m_aAttributeValue.m_aMinsize.m_aLengthValue.m_aLengthValue = 1;
+            m_aAttributeValue.m_aMinsize.m_aLengthValue.m_aOriginalText = new OUString(u"1%");
+            break;
+        case SmMlAttributeValueType::MlMovablelimits:
+            m_aAttributeValue.m_aMovablelimits.m_aMovablelimits
+                = SmMlAttributeValueMovablelimits::MlFalse;
+            break;
+        case SmMlAttributeValueType::MlRspace:
+            m_aAttributeValue.m_aRspace.m_aLengthValue.m_aLengthUnit = SmLengthUnit::MlEm;
+            m_aAttributeValue.m_aRspace.m_aLengthValue.m_aLengthValue = 5.0 / 18;
+            m_aAttributeValue.m_aRspace.m_aLengthValue.m_aOriginalText = new OUString(u"5/18em");
+            break;
+        case SmMlAttributeValueType::MlSeparator:
+            m_aAttributeValue.m_aSeparator.m_aSeparator = SmMlAttributeValueSeparator::MlFalse;
+            break;
+        case SmMlAttributeValueType::MlStretchy:
+            m_aAttributeValue.m_aStretchy.m_aStretchy = SmMlAttributeValueStretchy::MlFalse;
+            break;
+        case SmMlAttributeValueType::MlSymmetric:
+            m_aAttributeValue.m_aSymmetric.m_aSymmetric = SmMlAttributeValueSymmetric::MlFalse;
+            break;
+    }
+}
+
+void SmMlAttribute::setAttributeValue(const SmMlAttribute* aAttribute)
+{
+    switch (aAttribute->getMlAttributeValueType())
+    {
+        case SmMlAttributeValueType::NMlEmpty:
+            clearPreviousAttributeValue();
+            m_aSmMlAttributeValueType = SmMlAttributeValueType::NMlEmpty;
+            break;
+        case SmMlAttributeValueType::MlAccent:
+            setMlAccent(aAttribute->getMlAccent());
+            break;
+        case SmMlAttributeValueType::MlDir:
+            setMlDir(aAttribute->getMlDir());
+            break;
+        case SmMlAttributeValueType::MlDisplaystyle:
+            setMlDisplaystyle(aAttribute->getMlDisplaystyle());
+            break;
+        case SmMlAttributeValueType::MlFence:
+            setMlFence(aAttribute->getMlFence());
+            break;
+        case SmMlAttributeValueType::MlHref:
+            setMlHref(aAttribute->getMlHref());
+            break;
+        case SmMlAttributeValueType::MlLspace:
+            setMlLspace(aAttribute->getMlLspace());
+            break;
+        case SmMlAttributeValueType::MlMathbackground:
+            setMlMathbackground(aAttribute->getMlMathbackground());
+            break;
+        case SmMlAttributeValueType::MlMathcolor:
+            setMlMathcolor(aAttribute->getMlMathcolor());
+            break;
+        case SmMlAttributeValueType::MlMathsize:
+            setMlMathsize(aAttribute->getMlMathsize());
+            break;
+        case SmMlAttributeValueType::MlMathvariant:
+            setMlMathvariant(aAttribute->getMlMathvariant());
+            break;
+        case SmMlAttributeValueType::MlMaxsize:
+            setMlMaxsize(aAttribute->getMlMaxsize());
+            break;
+        case SmMlAttributeValueType::MlMinsize:
+            setMlMinsize(aAttribute->getMlMinsize());
+            break;
+        case SmMlAttributeValueType::MlMovablelimits:
+            setMlMovablelimits(aAttribute->getMlMovablelimits());
+            break;
+        case SmMlAttributeValueType::MlRspace:
+            setMlRspace(aAttribute->getMlRspace());
+            break;
+        case SmMlAttributeValueType::MlSeparator:
+            setMlSeparator(aAttribute->getMlSeparator());
+            break;
+        case SmMlAttributeValueType::MlStretchy:
+            setMlStretchy(aAttribute->getMlStretchy());
+            break;
+        case SmMlAttributeValueType::MlSymmetric:
+            setMlSymmetric(aAttribute->getMlSymmetric());
+            break;
+    }
+}
+
+/* get values */
+/*************************************************************************************************/
+
+const struct SmMlAccent* SmMlAttribute::getMlAccent() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlAccent)
+        return &m_aAttributeValue.m_aAccent;
+    return nullptr;
+}
+
+const struct SmMlDir* SmMlAttribute::getMlDir() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlDir)
+        return &m_aAttributeValue.m_aDir;
+    return nullptr;
+}
+
+const struct SmMlDisplaystyle* SmMlAttribute::getMlDisplaystyle() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlDisplaystyle)
+        return &m_aAttributeValue.m_aDisplaystyle;
+    return nullptr;
+}
+
+const struct SmMlFence* SmMlAttribute::getMlFence() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlFence)
+        return &m_aAttributeValue.m_aFence;
+    return nullptr;
+}
+
+const struct SmMlHref* SmMlAttribute::getMlHref() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlHref)
+        return &m_aAttributeValue.m_aHref;
+    return nullptr;
+}
+
+const struct SmMlLspace* SmMlAttribute::getMlLspace() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlLspace)
+        return &m_aAttributeValue.m_aLspace;
+    return nullptr;
+}
+
+const struct SmMlMathbackground* SmMlAttribute::getMlMathbackground() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlMathbackground)
+        return &m_aAttributeValue.m_aMathbackground;
+    return nullptr;
+}
+
+const struct SmMlMathcolor* SmMlAttribute::getMlMathcolor() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlMathcolor)
+        return &m_aAttributeValue.m_aMathcolor;
+    return nullptr;
+}
+
+const struct SmMlMathsize* SmMlAttribute::getMlMathsize() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlAccent)
+        return &m_aAttributeValue.m_aMathsize;
+    return nullptr;
+}
+
+const struct SmMlMathvariant* SmMlAttribute::getMlMathvariant() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlMathvariant)
+        return &m_aAttributeValue.m_aMathvariant;
+    return nullptr;
+}
+
+const struct SmMlMaxsize* SmMlAttribute::getMlMaxsize() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlMaxsize)
+        return &m_aAttributeValue.m_aMaxsize;
+    return nullptr;
+}
+
+const struct SmMlMinsize* SmMlAttribute::getMlMinsize() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlMinsize)
+        return &m_aAttributeValue.m_aMinsize;
+    return nullptr;
+}
+
+const struct SmMlMovablelimits* SmMlAttribute::getMlMovablelimits() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlMovablelimits)
+        return &m_aAttributeValue.m_aMovablelimits;
+    return nullptr;
+}
+
+const struct SmMlRspace* SmMlAttribute::getMlRspace() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlRspace)
+        return &m_aAttributeValue.m_aRspace;
+    return nullptr;
+}
+
+const struct SmMlSeparator* SmMlAttribute::getMlSeparator() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlSeparator)
+        return &m_aAttributeValue.m_aSeparator;
+    return nullptr;
+}
+
+const struct SmMlStretchy* SmMlAttribute::getMlStretchy() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlStretchy)
+        return &m_aAttributeValue.m_aStretchy;
+    return nullptr;
+}
+
+const struct SmMlSymmetric* SmMlAttribute::getMlSymmetric() const
+{
+    if (m_aSmMlAttributeValueType == SmMlAttributeValueType::MlSymmetric)
+        return &m_aAttributeValue.m_aSymmetric;
+    return nullptr;
+}
+
+/* set values */
+/*************************************************************************************************/
+
+void SmMlAttribute::setMlAccent(const SmMlAccent* aAccent)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aAccent.m_aAccent = aAccent->m_aAccent;
+}
+
+void SmMlAttribute::setMlDir(const SmMlDir* aDir)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aDir.m_aDir = aDir->m_aDir;
+}
+
+void SmMlAttribute::setMlDisplaystyle(const SmMlDisplaystyle* aDisplaystyle)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aDisplaystyle.m_aDisplaystyle = aDisplaystyle->m_aDisplaystyle;
+}
+
+void SmMlAttribute::setMlFence(const SmMlFence* aFence)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aFence.m_aFence = aFence->m_aFence;
+}
+
+void SmMlAttribute::setMlHref(const SmMlHref* aHref)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aHref.m_aHref = aHref->m_aHref;
+    m_aAttributeValue.m_aHref.m_aLnk = new OUString(*aHref->m_aLnk);
+}
+
+void SmMlAttribute::setMlLspace(const SmMlLspace* aLspace)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aLspace.m_aLengthValue.m_aLengthUnit
+        = aLspace->m_aLengthValue.m_aLengthUnit;
+    m_aAttributeValue.m_aLspace.m_aLengthValue.m_aLengthValue
+        = aLspace->m_aLengthValue.m_aLengthValue;
+    m_aAttributeValue.m_aLspace.m_aLengthValue.m_aOriginalText
+        = new OUString(*aLspace->m_aLengthValue.m_aOriginalText);
+}
+
+void SmMlAttribute::setMlMathbackground(const SmMlMathbackground* aMathbackground)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aMathbackground.m_aMathbackground = aMathbackground->m_aMathbackground;
+}
+
+void SmMlAttribute::setMlMathcolor(const SmMlMathcolor* aMathcolor)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aMathcolor.m_aMathcolor = aMathcolor->m_aMathcolor;
+}
+
+void SmMlAttribute::setMlMathsize(const SmMlMathsize* aMathsize)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aMathsize.m_aLengthValue.m_aLengthUnit
+        = aMathsize->m_aLengthValue.m_aLengthUnit;
+    m_aAttributeValue.m_aMathsize.m_aLengthValue.m_aLengthValue
+        = aMathsize->m_aLengthValue.m_aLengthValue;
+    m_aAttributeValue.m_aMathsize.m_aLengthValue.m_aOriginalText
+        = new OUString(*aMathsize->m_aLengthValue.m_aOriginalText);
+}
+
+void SmMlAttribute::setMlMathvariant(const SmMlMathvariant* aMathvariant)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aMathvariant.m_aMathvariant = aMathvariant->m_aMathvariant;
+}
+
+void SmMlAttribute::setMlMaxsize(const SmMlMaxsize* aMaxsize)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aMaxsize.m_aMaxsize = aMaxsize->m_aMaxsize;
+    m_aAttributeValue.m_aMaxsize.m_aLengthValue.m_aLengthUnit
+        = aMaxsize->m_aLengthValue.m_aLengthUnit;
+    m_aAttributeValue.m_aMaxsize.m_aLengthValue.m_aLengthValue
+        = aMaxsize->m_aLengthValue.m_aLengthValue;
+    m_aAttributeValue.m_aMaxsize.m_aLengthValue.m_aOriginalText
+        = new OUString(*aMaxsize->m_aLengthValue.m_aOriginalText);
+}
+
+void SmMlAttribute::setMlMinsize(const SmMlMinsize* aMinsize)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aMinsize.m_aMinsize = aMinsize->m_aMinsize;
+    m_aAttributeValue.m_aMinsize.m_aLengthValue.m_aLengthUnit
+        = aMinsize->m_aLengthValue.m_aLengthUnit;
+    m_aAttributeValue.m_aMinsize.m_aLengthValue.m_aLengthValue
+        = aMinsize->m_aLengthValue.m_aLengthValue;
+    m_aAttributeValue.m_aMinsize.m_aLengthValue.m_aOriginalText
+        = new OUString(*aMinsize->m_aLengthValue.m_aOriginalText);
+}
+
+void SmMlAttribute::setMlMovablelimits(const SmMlMovablelimits* aMovablelimits)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aMovablelimits.m_aMovablelimits = aMovablelimits->m_aMovablelimits;
+}
+
+void SmMlAttribute::setMlRspace(const SmMlRspace* aRspace)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aRspace.m_aLengthValue.m_aLengthUnit
+        = aRspace->m_aLengthValue.m_aLengthUnit;
+    m_aAttributeValue.m_aRspace.m_aLengthValue.m_aLengthValue
+        = aRspace->m_aLengthValue.m_aLengthValue;
+    m_aAttributeValue.m_aRspace.m_aLengthValue.m_aOriginalText
+        = new OUString(*aRspace->m_aLengthValue.m_aOriginalText);
+}
+
+void SmMlAttribute::setMlSeparator(const SmMlSeparator* aSeparator)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aSeparator.m_aSeparator = aSeparator->m_aSeparator;
+}
+
+void SmMlAttribute::setMlStretchy(const SmMlStretchy* aStretchy)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aStretchy.m_aStretchy = aStretchy->m_aStretchy;
+}
+
+void SmMlAttribute::setMlSymmetric(const SmMlSymmetric* aSymmetric)
+{
+    clearPreviousAttributeValue();
+    m_aAttributeValue.m_aSymmetric.m_aSymmetric = aSymmetric->m_aSymmetric;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/starmath/source/mathml/def.cxx b/starmath/source/mathml/def.cxx
new file mode 100644
index 000000000000..fe4c70299dc9
--- /dev/null
+++ b/starmath/source/mathml/def.cxx
@@ -0,0 +1,132 @@
+/* -*- 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 .
+ */
+
+#include <mathml/attribute.hxx>
+
+SmMlAttributePos starmathdatabase::MlAttributeListEmpty[] = {
+    // clang-format off
+    { SmMlAttributeValueType::NMlEmpty, 0 }
+    // clang-format on
+};
+
+SmMlAttributePos starmathdatabase::MlAttributeListMath[] = {
+    // clang-format off
+    { SmMlAttributeValueType::NMlEmpty, 0 }
+    // clang-format on
+};
+
+SmMlAttributePos starmathdatabase::MlAttributeListMi[] = {
+    // clang-format off
+    { SmMlAttributeValueType::MlHref, 0 },
+    { SmMlAttributeValueType::MlDir, 1 },
+    { SmMlAttributeValueType::MlMathbackground, 2 },
+    { SmMlAttributeValueType::MlMathcolor, 3 },
+    { SmMlAttributeValueType::MlDisplaystyle, 4 },
+    { SmMlAttributeValueType::MlMathsize, 5 },
+    { SmMlAttributeValueType::MlMathvariant, 6 }
+    // clang-format on
+};
+
+SmMlAttributePos starmathdatabase::MlAttributeListMerror[] = {
+    // clang-format off
+    { SmMlAttributeValueType::MlHref, 0 },
+    { SmMlAttributeValueType::MlMathbackground, 1 },
+    { SmMlAttributeValueType::MlMathcolor, 2 },
+    { SmMlAttributeValueType::MlDisplaystyle, 3 }
+    // clang-format on
+};
+
+SmMlAttributePos starmathdatabase::MlAttributeListMn[] = {
+    // clang-format off
+    { SmMlAttributeValueType::MlHref, 0 },
+    { SmMlAttributeValueType::MlDir, 1 },
+    { SmMlAttributeValueType::MlMathbackground, 2 },
+    { SmMlAttributeValueType::MlMathcolor, 3 },
+    { SmMlAttributeValueType::MlDisplaystyle, 4 },
+    { SmMlAttributeValueType::MlMathsize, 5 },
+    { SmMlAttributeValueType::MlMathvariant, 6 }
+    // clang-format on
+};
+
+SmMlAttributePos starmathdatabase::MlAttributeListMo[] = {
+    // clang-format off
+    { SmMlAttributeValueType::MlHref, 0 },
+    { SmMlAttributeValueType::MlDir, 1 },
+    { SmMlAttributeValueType::MlMathbackground, 2 },
+    { SmMlAttributeValueType::MlMathcolor, 3 },
+    { SmMlAttributeValueType::MlDisplaystyle, 4 },
+    { SmMlAttributeValueType::MlMathsize, 5 },
+    { SmMlAttributeValueType::MlMathvariant, 6 },
+    { SmMlAttributeValueType::MlFence, 7 },
+    { SmMlAttributeValueType::MlMaxsize, 8 },
+    { SmMlAttributeValueType::MlMinsize, 9 },
+    { SmMlAttributeValueType::MlMovablelimits, 10 },
+    { SmMlAttributeValueType::MlLspace, 11 },
+    { SmMlAttributeValueType::MlRspace, 12 },
+    { SmMlAttributeValueType::MlAccent, 13 },
+    { SmMlAttributeValueType::MlStretchy, 14 },
+    { SmMlAttributeValueType::MlSeparator, 15 },
+    { SmMlAttributeValueType::MlSymmetric, 16 }
+    // clang-format on
+};
+
+SmMlAttributePos starmathdatabase::MlAttributeListMrow[] = {
+    // clang-format off
+    { SmMlAttributeValueType::MlHref, 0 },
+    { SmMlAttributeValueType::MlDir, 1 },
+    { SmMlAttributeValueType::MlMathbackground, 2 },
+    { SmMlAttributeValueType::MlMathcolor, 3 }
+    // clang-format on
+};
+
+SmMlAttributePos starmathdatabase::MlAttributeListMtext[] = {
+    // clang-format off
+    { SmMlAttributeValueType::MlHref, 0 },
+    { SmMlAttributeValueType::MlDir, 1 },
+    { SmMlAttributeValueType::MlMathbackground, 2 },
+    { SmMlAttributeValueType::MlMathcolor, 3 },
+    { SmMlAttributeValueType::MlDisplaystyle, 4 },
+    { SmMlAttributeValueType::MlMathsize, 5 },
+    { SmMlAttributeValueType::MlMathvariant, 6 }
+    // clang-format on
+};
+
+SmMlAttributePos starmathdatabase::MlAttributeListMstyle[] = {
+    // clang-format off
+    { SmMlAttributeValueType::MlHref, 0 },
+    { SmMlAttributeValueType::MlDir, 1 },
+    { SmMlAttributeValueType::MlMathbackground, 2 },
+    { SmMlAttributeValueType::MlMathcolor, 3 },
+    { SmMlAttributeValueType::MlDisplaystyle, 4 },
+    { SmMlAttributeValueType::MlMathsize, 5 },
+    { SmMlAttributeValueType::MlMathvariant, 6 },
+    { SmMlAttributeValueType::MlFence, 7 },
+    { SmMlAttributeValueType::MlMaxsize, 8 },
+    { SmMlAttributeValueType::MlMinsize, 9 },
+    { SmMlAttributeValueType::MlMovablelimits, 10 },
+    { SmMlAttributeValueType::MlLspace, 11 },
+    { SmMlAttributeValueType::MlRspace, 12 },
+    { SmMlAttributeValueType::MlAccent, 13 },
+    { SmMlAttributeValueType::MlStretchy, 14 },
+    { SmMlAttributeValueType::MlSeparator, 15 },
+    { SmMlAttributeValueType::MlSymmetric, 16 }
+    // clang-format on
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/starmath/source/mathml/element.cxx b/starmath/source/mathml/element.cxx
new file mode 100644
index 000000000000..32ac040e0f2e
--- /dev/null
+++ b/starmath/source/mathml/element.cxx
@@ -0,0 +1,134 @@
+/* -*- 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 .
+ */
+
+#include <mathml/element.hxx>
+
+void SmMlElement::SmImplAttributeType()
+{
+    switch (m_aElementType)
+    {
+        case SmMlElementType::NMlEmpty:
+            m_aAttributePosList = std::vector<SmMlAttributePos>(0);
+            break;
+        case SmMlElementType::NMlStructural:
+            m_aAttributePosList = std::vector<SmMlAttributePos>(0);
+            break;
+        case SmMlElementType::NMlSmNode:
+            m_aAttributePosList = std::vector<SmMlAttributePos>(0);
+            break;
+        case SmMlElementType::MlMath:
+            m_aAttributePosList = std::vector<SmMlAttributePos>(0);
+            //m_aAttributePosList = std::vector<SmMlAttributePos>(std::begin(starmathdatabase::MlAttributeListMath), std::end(starmathdatabase::MlAttributeListMath));
+            break;
+        case SmMlElementType::MlMi:
+            m_aAttributePosList
+                = std::vector<SmMlAttributePos>(std::begin(starmathdatabase::MlAttributeListMi),
+                                                std::end(starmathdatabase::MlAttributeListMi));
+            break;
+        case SmMlElementType::MlMerror:
+            m_aAttributePosList
+                = std::vector<SmMlAttributePos>(std::begin(starmathdatabase::MlAttributeListMerror),
+                                                std::end(starmathdatabase::MlAttributeListMerror));
+            break;
+        case SmMlElementType::MlMn:
+            m_aAttributePosList
+                = std::vector<SmMlAttributePos>(std::begin(starmathdatabase::MlAttributeListMn),
+                                                std::end(starmathdatabase::MlAttributeListMn));
+            break;
+        case SmMlElementType::MlMo:
+            m_aAttributePosList
+                = std::vector<SmMlAttributePos>(std::begin(starmathdatabase::MlAttributeListMo),
+                                                std::end(starmathdatabase::MlAttributeListMo));
+            break;
+        case SmMlElementType::MlMrow:
+            m_aAttributePosList
+                = std::vector<SmMlAttributePos>(std::begin(starmathdatabase::MlAttributeListMrow),
+                                                std::end(starmathdatabase::MlAttributeListMrow));
+            break;
+        case SmMlElementType::MlMtext:
+            m_aAttributePosList
+                = std::vector<SmMlAttributePos>(std::begin(starmathdatabase::MlAttributeListMtext),
+                                                std::end(starmathdatabase::MlAttributeListMtext));
+            break;
+        case SmMlElementType::MlMstyle:
+            m_aAttributePosList
+                = std::vector<SmMlAttributePos>(std::begin(starmathdatabase::MlAttributeListMstyle),
+                                                std::end(starmathdatabase::MlAttributeListMstyle));
+            break;
+        default:
+            break;
+    }
+    // Create attribute vector with given pattern
+    m_aAttributeList = starmathdatabase::makeMlAttributeList(m_aAttributePosList);
+}
+
+SmMlAttribute SmMlElement::getAttribute(SmMlAttributeValueType aElementType) const
+{
+    // Look for the attribute position and return if exists
+    for (size_t i = 0; i < m_aAttributePosList.size(); ++i)
+    {
+        if (m_aAttributePosList[i].m_aAttributeValueType == aElementType)
+            return m_aAttributeList[m_aAttributePosList[i].m_nPos];
+    }
+    return SmMlAttribute();
+}
+
+void SmMlElement::setAttribute(const SmMlAttribute* aAttribute)
+{
+    // Look for the attribute position and assign if exists
+    for (size_t i = 0; i < m_aAttributePosList.size(); ++i)
+    {
+        if (m_aAttributePosList[i].m_aAttributeValueType == aAttribute->getMlAttributeValueType())
+        {
+            m_aAttributeList[m_aAttributePosList[i].m_nPos].setMlAttributeValue(aAttribute);
+            break;
+        }
+    }
+}
+
+void SmMlElement::setSubElement(size_t nPos, SmMlElement* aElement)
+{
+    // This is the new parent element
+    aElement->setParentElement(this);
+    // Check if the vector is long enought
+    // Careful nOldSize can be 0 and -1 will underflow
+    // We must put something on the empty locations
+    size_t nOldSize = m_aSubElements.size();
+    if (nPos + 1 > nOldSize)
+    {
+        m_aSubElements.resize(nPos + 1);
+        for (; nOldSize < nPos; ++nOldSize)
+            m_aSubElements[nOldSize] = nullptr;
+    }
+    // Assign value
+    m_aSubElements[nPos] = aElement;
+}
+
+std::vector<SmMlAttribute>
+starmathdatabase::makeMlAttributeList(std::vector<SmMlAttributePos> aAttributePosList)
+{
+    std::vector<SmMlAttribute> aAttributeList(aAttributePosList.size());
+    for (size_t i = 0; i < aAttributePosList.size(); ++i)
+    {
+        aAttributeList[i].setMlAttributeValueType(aAttributePosList[i].m_aAttributeValueType);
+    }
+    return aAttributeList;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */