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diff --git a/forms/source/xforms/mip.hxx b/forms/source/xforms/mip.hxx
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+++ b/forms/source/xforms/mip.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 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+
+namespace xforms
+{
+/** represents the XForms *m*odel *i*tem *p*roperties (MIPs) for a
+ * given XNode in the instance data at a given point in time.  The
+ * values will not be updated; for updated values new MIP objects have
+ * to be created/queried. */
+class MIP
+{
+    bool mbHasReadonly;
+    bool mbReadonly;
+
+    bool mbHasRequired;
+    bool mbRequired;
+
+    bool mbHasRelevant;
+    bool mbRelevant;
+
+    bool mbHasConstraint;
+    bool mbConstraint;
+
+    bool mbHasCalculate;
+
+    bool mbHasTypeName;
+    OUString msTypeName;
+
+    OUString msConstraintExplanation;
+
+public:
+    MIP();
+
+    /// inherit from upper-level MIPs
+    void inherit(const MIP&);
+
+    /// join with same-level MIPs
+    void join(const MIP&);
+
+    // - type (static; default: xsd:string)
+    //        (currently default implemented as empty string)
+    const OUString& getTypeName() const { return msTypeName; }
+    void setTypeName(const OUString&);
+    void resetTypeName();
+
+    // - readonly (computed XPath; default: false; true if calculate exists)
+    bool isReadonly() const;
+    void setReadonly(bool);
+    void resetReadonly();
+
+    // - required (computed XPath; default: false)
+    bool isRequired() const { return mbRequired; }
+    void setRequired(bool);
+    void resetRequired();
+
+    // - relevant (computed XPath; default: true)
+    bool isRelevant() const { return mbRelevant; }
+    void setRelevant(bool);
+    void resetRelevant();
+
+    // - constraint (computed XPath; default: true)
+    bool isConstraint() const { return mbConstraint; }
+    void setConstraint(bool);
+    void resetConstraint();
+
+    // explain _why_ a constraint failed
+    void setConstraintExplanation(const OUString&);
+    const OUString& getConstraintExplanation() const { return msConstraintExplanation; }
+
+    // - calculate (computed XPath; default: has none (false))
+    //   (for calculate, we only store whether a calculate MIP is present;
+    //    the actual calculate value is handled my changing the instance
+    //    directly)
+    void setHasCalculate(bool);
+
+    // - minOccurs/maxOccurs (computed XPath; default: 0/inf)
+    // - p3ptype (static; no default)
+};
+
+} // namespace xforms
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */