title: <xsl:sort> not working in XSLT PI mapping
body: <p>I'm newbie to xslt and i have below code which is not working for simple sort: help is appriciated.</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;xsl:template match="ns0:MT_name"&gt;
  &lt;xsl:for-each select="name"&gt;
  &lt;xsl:sort select="name"/&gt;
  &lt;/xsl:for-each&gt;
  &lt;/xsl:template&gt;
  </code></pre>
  
  <h2>input is:</h2>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;ns0:MT_name xmlns:ns0="http://example.com/sap/pi/TEST/xslt"&gt;
     &lt;name&gt;11&lt;/name&gt;
     &lt;name&gt;88&lt;/name&gt;
     &lt;name&gt;55&lt;/name&gt;
  &lt;/ns0:MT_name&gt;
  </code></pre>
  
  <h2>output expected:</h2>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;ns0:MT_name xmlns:ns0="http://example.com/sap/pi/TEST/xslt"&gt;
     &lt;name&gt;11&lt;/name&gt;
     &lt;name&gt;55&lt;/name&gt;
     &lt;name&gt;88&lt;/name&gt;
  &lt;/ns0:MT_name&gt;
  </code></pre>