Please add a new attribute to <x:parse> which allows the assignment of a prefix 
for the default namespace. Otherwise it is not possible to access elements 
belonging to the default namespace from other <x:.../>-tags.

Example response from a webservice (simulated via <c:set/>:

<c:set var="responseXML">
<?xml version="1.0"?>
<Message Version="1.0" xmlns="http://some_ns_url">
  <Transport/>
  <MessageHeader>
    <Response/>
    <Key></Key>
  </MessageHeader>
  <MessageBody>
    <GetPackageList.Response>
      <Exception>
        <MainCode>2</MainCode>
        <SubCode></SubCode>
        <Type>T</Type>
        <Subject>Error: Unknown package location</Subject>
        <Description></Description>
      </Exception>
    </GetPackageList.Response>
  </MessageBody>
</Message>
</c:set>

<x:parse xml="${responseXML}" var="parsableXML"/>

<x:out 
select="$parsableXML/Message/MessageBody/GetPackageList.Response/Exception/Subje
ct"/>


The above <x:out> will not find the Subject-element unless one could reassign 
the default namespace in the responseXML to e.g. xmlns:ns1="http://some_ns_url"