Using code similar to the snippet I'm pasting below, I need to be able to 
loop through the XML and retrieve specific pieces of information such as the 
average counter_cpu_idle, the average counter_cpu_idle_states, etc.  The file 
includes multiple entries along the line of <data 
xsi:type="ns2:perf_dataType">.  

Other information I needed from a different XML file was easy to navigate to 
with simple XPath statements, but this looked like it requires XSLT...and I'm 
not sure where to start.  Any help would be greatly appreciated!

<?xml version="1.0" encoding="UTF-8"?>
<packet xmlns:ns1="http://www.swsoft.com/webservices/vzl/4.0.0/protocol" 
        xmlns:ns2="http://www.swsoft.com/webservices/vzl/4.0.0/types" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        time="2009-05-05T17:56:17+0000" priority="0" version="4.0.0">
  <ns1:origin>perf_mon</ns1:origin>
  <ns1:target>vzclient12-64881bf8-4953-4d5d-e80a-8e1e49b4a2ab</ns1:target>
  <ns1:dst>
    <director>gend</director>
  </ns1:dst>
  <ns1:data>
    <perf_mon>
      <data xsi:type="ns2:perf_dataType">
        <ns2:eid>42b1462a-ed4b-40b9-b627-75b364719731</ns2:eid>
        <ns2:interval xsi:type="ns2:intervalType">
          <ns2:start_time>2009-05-05T17:41:17+0000</ns2:start_time>
          <ns2:end_time>2009-05-05T17:56:17+0000</ns2:end_time>
        </ns2:interval>
        <ns2:class>
          <ns2:name>counters_vz_cpu</ns2:name>
          <ns2:instance>
            <ns2:name></ns2:name>
            <ns2:counter>
              <ns2:name>counter_cpu_idle</ns2:name>
              <ns2:value>
                <ns2:avg>36008546270</ns2:avg>
                <ns2:min>36008546270</ns2:min>
                <ns2:max>36008546270</ns2:max>
                <ns2:cur>36008546270</ns2:cur>
              </ns2:value>
            </ns2:counter>
            <ns2:counter>
              <ns2:name>counter_cpu_idle_states</ns2:name>
              <ns2:value>
                <ns2:avg>99</ns2:avg>
                <ns2:min>99</ns2:min>
                <ns2:max>100</ns2:max>
                <ns2:cur>100</ns2:cur>
              </ns2:value>
            </ns2:counter>
            <ns2:counter>
              <ns2:name>counter_cpu_limit</ns2:name>
              <ns2:value>
                <ns2:avg>100.000000</ns2:avg>
                <ns2:min>100.000000</ns2:min>
                <ns2:max>100.000000</ns2:max>
                <ns2:cur>100.000000</ns2:cur>
              </ns2:value>
            </ns2:counter>

-- 
Things are more like they are now than they ever have been before.