title: Getting a node in XML using fieldname in ESQL
body: <p>How to get the elements of an XML if we know the nodename.I have a sample XML like below.</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  &lt;!DOCTYPE PARTS SYSTEM "parts.dtd"&gt;
  &lt;?xml-stylesheet type="text/css" href="xmlpartsstyle.css"?&gt;
  &lt;PARTS&gt;
     &lt;TITLE&gt;Computer Parts&lt;/TITLE&gt;
  &lt;PART&gt;
    &lt;ITEM&gt;Motherboard&lt;/ITEM&gt;
    &lt;MANUFACTURER&gt;ASUS&lt;/MANUFACTURER&gt;
    &lt;MODEL&gt;P3B-F&lt;/MODEL&gt;
    &lt;COST&gt; 123.00&lt;/COST&gt;
  &lt;/PART&gt;
  &lt;PART&gt;
    &lt;ITEM&gt;Video Card&lt;/ITEM&gt;
    &lt;MANUFACTURER&gt;ATI&lt;/MANUFACTURER&gt;
    &lt;MODEL&gt;All-in-Wonder Pro&lt;/MODEL&gt;
    &lt;COST&gt; 160.00&lt;/COST&gt;
  &lt;/PART&gt;
  &lt;PART&gt;
    &lt;ITEM&gt;Sound Card&lt;/ITEM&gt;
    &lt;MANUFACTURER&gt;Creative Labs&lt;/MANUFACTURER&gt;
    &lt;MODEL&gt;Sound Blaster Live&lt;/MODEL&gt;
    &lt;COST&gt; 80.00&lt;/COST&gt;
  &lt;/PART&gt;
  &lt;PART&gt;
    &lt;ITEMᡋ inch Monitor&lt;/ITEM&gt;
    &lt;MANUFACTURER&gt;LG Electronics&lt;/MANUFACTURER&gt;
    &lt;MODEL&gt; 995E&lt;/MODEL&gt;
    &lt;COST&gt; 290.00&lt;/COST&gt;
  &lt;/PART&gt;
  </code></pre>
  
  <p></p>
  
  <p>I want to get all the  element in an array using esql. How to do it?</p>