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diff --git a/src/util/ege-tags.h b/src/util/ege-tags.h
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+// SPDX-License-Identifier: GPL-2.0-or-later OR MPL-1.1 OR LGPL-2.1-or-later
+#ifndef SEEN_EGE_TAGS_H
+#define SEEN_EGE_TAGS_H
+
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is EGE Tagging Support.
+ *
+ * The Initial Developer of the Original Code is
+ * Jon A. Cruz.
+ * Portions created by the Initial Developer are Copyright (C) 2009
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <string>
+#include <vector>
+#include <map>
+
+/*
+ * Implements base tagging of http://create.freedesktop.org/wiki/ResourceTagging .
+ */
+
+// Note that this API is preliminary and subject to frequent change:
+
+namespace ege
+{
+
+class Label
+{
+public:
+    Label();
+    Label(std::string  lang, std::string  value);
+    ~Label();
+
+    std::string lang;
+    std::string value;
+};
+
+class Tag
+{
+public:
+    Tag();
+    Tag(std::string  key);
+    ~Tag();
+
+    std::string key;
+    std::vector<Label> labels;
+};
+
+
+/**
+ * Contains a set of tags with unique keys, and with locale support.
+ *
+ */
+class TagSet
+{
+public:
+    TagSet();
+    ~TagSet();
+
+    std::string const & getLang() const;
+    void setLang(std::string const& lang);
+
+    /**
+     * Adds or updates a tag.
+     *
+     * @return true if a tag was updated, false if it was added.
+     */
+    bool addTag(Tag const& tag);
+    std::vector<Tag> const& getTags();
+
+    int getCount( std::string const& key );
+    void increment( std::string const& key );
+    void decrement( std::string const& key );
+
+private:
+
+    std::string lang;
+    std::vector<Tag> tags;
+    std::map<std::string, int> counts;
+};
+
+} // namespace ege
+
+
+#endif // SEEN_EGE_TAGS_H
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :