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diff --git a/src/transformations/uniqueid/UniqueIdTransformation.hpp b/src/transformations/uniqueid/UniqueIdTransformation.hpp
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+++ b/src/transformations/uniqueid/UniqueIdTransformation.hpp
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+/*
+    Ousía
+    Copyright (C) 2014  Benjamin Paaßen, Andreas Stöckel
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file UniqueIdTransformation.hpp
+ *
+ * Contains a transformation capable of generating unique ids for referenced
+ * document nodes.
+ *
+ * @author Andreas Stöckel (astoecke@techfak.uni-bielefeld.de)
+ */
+
+#ifndef _OUSIA_UNIQUE_ID_TRANSFORMATION_HPP_
+#define _OUSIA_UNIQUE_ID_TRANSFORMATION_HPP_
+
+#include <core/model/Document.hpp>
+
+namespace ousia {
+
+/**
+ * The UniqueIdTransformation class implements a transformation that attaches
+ * unique ids to elements that are being referenced in the document. These
+ * unique ids can for example be used in XML or HTML output.
+ *
+ * TODO: Write an actual base class for transformations and derive from it
+ */
+class UniqueIdTransformation {
+public:
+	/**
+	 * Applys the transformation to the given document.
+	 *
+	 * @param doc is the document for which unique IDs should be generated.
+	 */
+	static void transform(Handle<Document> doc);
+};
+
+}
+
+#endif /* _OUSIA_UNIQUE_ID_TRANSFORMATION_HPP_ */
+