title: string length to find length of the repeating node
body: <p>My xml looks like</p>
  
  <pre><code>&lt;details&gt;
    &lt;addr&gt;
        &lt;streetAddressLine&gt;90822 abc lane&lt;/streetAddressLine&gt;
        &lt;streetAddressLine&gt;apt b&lt;/streetAddressLine&gt;
        &lt;!-- streetAddressLine element is repeatable --&gt;
        &lt;state&gt;xyz&lt;/state&gt;
    &lt;/addr&gt;
  &lt;/details&gt;
  </code></pre>
  
  <p>I am looking for xpath expression which can give me the length of string-length(streetAddressLine[0]) + string-length (streetAddressLine[1]) + ..... + string-length(streetAddressLine[n])</p>