Oracle XMLTABLE namespace issue
<p>I am trying to get envelope_id as 80621b17-97a8-926d945b602a from the below XML through this script, but nothing comes out. Can any one have any idea ?</p>

<pre><code>SELECT b.EnvelopeID
FROM   sample_xml a,
       XMLTABLE(xmlnamespaces('http://www.w3.org/2001/XMLSchema' as "xsd_k",
                              'http://www.w3.org/2001/XMLSchema-instance' AS "xsi",
                              'http://www.docusign.net/API/3.0' AS "k"),
       '/xsd_k:DocuSignEnvelopeInformation/xsd_k:EnvelopeStatus' PASSING a.xml
                       COLUMNS EnvelopeID        VARCHAR2(200)   PATH 'EnvelopeID')b;
</code></pre>

<p>My sample xml is :</p>

<pre><code>&lt;DocuSignEnvelopeInformation xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.docgign.net/API/3.0"&gt;
  &lt;EnvelopeStatus&gt;
    &lt;EnvelopeID&gt;80621b17-97a8-926d945b602a&lt;/EnvelopeID&gt;
   &lt;/EnvelopeStatus&gt;
&lt;/DocuSignEnvelopeInformation&gt;
</code></pre>