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diff --git a/starmath/source/mathmlattr.hxx b/starmath/source/mathmlattr.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+#ifndef INCLUDED_STARMATH_SOURCE_MATHMLATTR_HXX
+#define INCLUDED_STARMATH_SOURCE_MATHMLATTR_HXX
+
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <tools/fract.hxx>
+
+// MathML 3: 2.1.5.1 Syntax notation used in the MathML specification
+// <https://www.w3.org/TR/MathML/chapter2.html#id.2.1.5.1>
+// MathML 2: 2.4.4.2 Attributes with units
+// <https://www.w3.org/TR/MathML2/chapter2.html#fund.attval>
+// MathML 3: 2.1.5.2 Length Valued Attributes
+// <https://www.w3.org/TR/MathML/chapter2.html#fund.units>
+
+enum class MathMLLengthUnit {
+    None,
+    Em,
+    Ex,
+    Px,
+    In,
+    Cm,
+    Mm,
+    Pt,
+    Pc,
+    Percent
+};
+
+struct MathMLAttributeLengthValue
+{
+    Fraction aNumber;
+    MathMLLengthUnit eUnit;
+    MathMLAttributeLengthValue()
+        : eUnit(MathMLLengthUnit::None)
+    {
+    }
+};
+
+sal_Int32 ParseMathMLAttributeLengthValue(const OUString &rStr, MathMLAttributeLengthValue& rV);
+
+
+// MathML 3: 3.2.2 Mathematics style attributes common to token elements
+// <https://www.w3.org/TR/MathML3/chapter3.html#presm.commatt>
+
+enum class MathMLMathvariantValue {
+    Normal,
+    Bold,
+    Italic,
+    BoldItalic,
+    DoubleStruck,
+    BoldFraktur,
+    Script,
+    BoldScript,
+    Fraktur,
+    SansSerif,
+    BoldSansSerif,
+    SansSerifItalic,
+    SansSerifBoldItalic,
+    Monospace,
+    Initial,
+    Tailed,
+    Looped,
+    Stretched
+};
+
+bool GetMathMLMathvariantValue(const OUString &rStr, MathMLMathvariantValue& rV);
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */