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diff --git a/cpp/src/qpid/amqp/Descriptor.h b/cpp/src/qpid/amqp/Descriptor.h
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+++ b/cpp/src/qpid/amqp/Descriptor.h
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+#ifndef QPID_AMQP_DESCRIPTOR_H
+#define QPID_AMQP_DESCRIPTOR_H
+
+/*
+ *
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+#include "qpid/amqp/CharSequence.h"
+#include "qpid/sys/IntegerTypes.h"
+#include <ostream>
+
+namespace qpid {
+namespace amqp {
+
+/**
+ * Representation of an AMQP 1.0 type descriptor.
+ */
+struct Descriptor
+{
+    union {
+        CharSequence symbol;
+        uint64_t code;
+    } value;
+    enum {
+        NUMERIC,
+        SYMBOLIC
+    } type;
+
+    Descriptor(uint64_t code);
+    Descriptor(const CharSequence& symbol);
+    bool match(const std::string&, uint64_t) const;
+};
+
+std::ostream& operator<<(std::ostream& os, const Descriptor& d);
+
+}} // namespace qpid::amqp
+
+#endif  /*!QPID_AMQP_DESCRIPTOR_H*/