specs/amqp-errata.0-9.xml

<?xml version = "1.0"?>
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<amqp major = "0" minor = "9" port = "5672" comment = "AMQ Protocol version 0-9">

  <constant name = "frame-request"    value = "9" />
  <constant name = "frame-response"   value = "10" />

  <!-- ==  MESSAGE  =========================================================== -->

  <class name = "message" index = "120">
    <method name = "transfer" index = "10">
      <chassis name = "server" implement = "MUST" />
      <chassis name = "client" implement = "MUST" />
      <field name = "mandatory" type = "bit" label = "indicate mandatory routing">
        <doc>
          This flag tells the server how to react if the message cannot be
          routed to a queue.  If this flag is set, the server will return an
          unroutable message with a Return method.  If this flag is zero, the
          server silently drops the message.
        </doc>
      </field>   
    </method>
  </class>

</amqp>