Some use cases require the originating entity, e.g. a client, to generate the stanza ID. In this case, the client MUST use the &origin-id; element extension element qualified by the 'urn:xmpp:sid:0' namespace. Note that originating entities often want to conceal their XMPP address and therefore the &origin-id; element has no 'by' attribute.
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<examplecaption='A message stanza with the stanza ID extension.'><![CDATA[
<examplecaption='A message stanza with the origin ID extension.'><![CDATA[