Oh and another couple of things quickly; the <perl> tag allows for embedding perl into the aXML docs, and another pair of really useful tags I have are the

  <loggedin>  markup to show if the user is logged in </loggedin>
  <notloggedin> markup to show if the user is not logged in</notlogged
+in>

as with all the tags, nesting allows building of complexity
such that

 <loggedin>[use]somefile[/use]</loggedin>

loads up "somefile" if the user is logged in.

you can also do it another way

<use>somefile<notloggedin>guest</notloggedin></use>

where the string "somefileguest" is the result when the user
is not logged in, and "somefile" is the result if they are.

the code for the loggedin / notlogged in tags is again very simple;

listing "/plugins/loggedin.aXMLpi"
----------------------------------

if ($userdata->{'loggedin'})
  {
   $result = $data;
  }

listing "/plugins/notloggedin.aXMLpi"
-------------------------------------

unless ($userdata->{'loggedin'})
  {
   $result = $data;
  }
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