title: The prefix "xsi" for attribute "xsi:type" associated with an element type is not bound
body: <p>I wrote XSLT, but I'm getting the following error:</p>
  
  <blockquote>
    <p>The prefix <code>xsi</code> for attribute <code>xsi:type</code> associated with an element type <code>RemoteException</code> is not bound.</p>
  </blockquote>
  
  <p><strong>My input XML is</strong></p>
  
  <pre><code>&lt;RemoteException xsi:type='ns1:Exception' xmlns:ns1='http://errorhandling.service.e2e.de'&gt;
       &lt;causeClass xsi:type='xsd:string'&gt;de.common.exception.StringLengthException&lt;/causeClass&gt;
       &lt;causeMessage xsi:type='xsd:string'&gt;lfdNr has invalid length: 11 (min: 14, max: 14, content: '035593111P0')&lt;/causeMessage&gt;
       &lt;causeStackTrace xsi:type='xsd:string'&gt;at)&lt;/causeStackTrace&gt;
       &lt;errorCode xsi:type='xsd:int'&gt;201&lt;/errorCode&gt;
       &lt;message xsi:type='xsd:string'&gt;invalid length&lt;/message&gt;
      &lt;/RemoteException&gt;
  </code></pre>
  
  <p><strong>XSLT Code</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;xsl:stylesheet version="1.0" exclude-result-prefixes="xsl soap response ns1   xsi" 
  
  xmlns:response="http://tempuri.org/" 
  
  xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" 
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
  xmlns:ns1="http://errorhanlding.service.e2e..de" 
  
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"&gt;
     &lt;!-- Output --&gt;
     &lt;xsl:output method="xml" encoding="UTF-8" indent="yes"/&gt;
     &lt;xsl:strip-space elements="*"/&gt;
     &lt;xsl:template match="/"&gt;
  
       &lt;xsl:if test="//RemoteException"&gt;
           &lt;Fault_MT_Test&gt;
              &lt;standard&gt;
                 &lt;faultText&gt;
                    &lt;xsl:value-of select="//faultstring"/&gt;
                 &lt;/faultText&gt;
                 &lt;faultUrl&gt;
                    &lt;xsl:value-of select="//faultcode"/&gt;
                 &lt;/faultUrl&gt;
              &lt;/standard&gt;
           &lt;/Fault_MT_Test&gt;
        &lt;/xsl:if&gt;
  
     &lt;/xsl:template&gt;
  &lt;/xsl:stylesheet&gt;
  </code></pre>
  
  <p>Could you please explain to me what this error means and how to eliminate it?</p>