title: xsl format date (substring + concatenate ?)
body: <p>I have the input </p>
  
  <pre><code>&lt;Date value="20091223"/&gt;
  </code></pre>
  
  <p>and I want the output to be </p>
  
  <pre><code>&lt;Date&gt;23122009&lt;/Date&gt;
  </code></pre>
  
  <p>I was trying to use substring function to reformat the date</p>
  
  <pre><code>&lt;xsl:value-of select="substring($Date,1,4)"/&gt;
  </code></pre>
  
  <p>But how to concatenate the extracted year and months and day together.</p>