title: XPath expression won't accept variable
body: <p>Here is the sample code:</p>
  
  <pre><code>$xml = New-Object XML
  $xml.load('C:\Users\Example\Desktop\examp.xml')
  
  # this works
  $node = $xml.selectSingleNode("//SERVER[@name='EXAMPLE']")
  
  # this does not work
  $t = 'EXAMPLE'
  $node = $xml.selectSingleNode("//SERVER[@name=$t]")
  </code></pre>
  
  <p>Why? If you would like to see the XML as well, please say so.</p>