<root> 
  <test:content> 
    <p>Hallo Text</p> 
  </test:content> 
  <anhang> 
    <p>Anhangtext</p> 
  </anhang> 
</root> 

var myDoc = app.activeDocument; 
var _xmlroot = myDoc.xmlElements[0]; 
 
var myMappingTable = new Array(); 
var prefix = new Array(); 
prefix[1] = "test"; 
prefix[0] = "http://www.test.de/"; 
 
myMappingTable.push(prefix); 
 
// funktioniert nicht 
var _mynode = _xmlroot.evaluateXPathExpression("/*/*", myMappingTable); 

<?xml version="1.0" encoding="UTF-8"?> 
<Root xmlns:test="http://www.test.de">  
    <test:content>  
        <p>Hallo Text</p>  
    </test:content>  
    <anhang>  
        <p>Anhangtext</p>  
    </anhang>  
</Root>