title: XSL - change all XML Element null values to dash
body: <p>I have got xml which has many children and sub children. I have to go through all values of element and if there are any nulls or blank I have to change it to dash or some other value. </p>
  
  <p>xml example</p>
  
  <pre><code>&lt;list&gt;
    &lt;biglist&gt;
     &lt;item&gt;1&lt;/item&gt;
     &lt;item&gt;0&lt;/item&gt;
     &lt;item&gt;2&lt;/item&gt;
     &lt;item&gt;1&lt;/item&gt;
     &lt;item&gt;&lt;/item&gt;
     &lt;item&gt;8&lt;/item&gt;
     &lt;smallList&gt;
       &lt;smallitem&gt;0&lt;/smallitem&gt;
       &lt;smallitem&gt;&lt;/smallitem&gt;
       &lt;smallitem&gt;&lt;/smallitem&gt;
       &lt;smallitem&gt;4&lt;/smallitem&gt;
      &lt;/smallList&gt;
    &lt;/biglist&gt;
  &lt;/list&gt;
  </code></pre>
  
  <p>output</p>
  
  <pre><code>&lt;div id=biglist&gt;
     &lt;div&gt;1&lt;/div&gt;
     &lt;div&gt;0&lt;/div&gt;
     &lt;div&gt;2&lt;/div&gt;
     &lt;div&gt;1&lt;/div&gt;
     &lt;div&gt;&lt;strong&gt; Value not found &lt;/strong&gt;&lt;/div&gt;
     &lt;div&gt;8&lt;/div&gt;
     &lt;div id=smallList&gt;
       &lt;div&gt;0&lt;/div&gt;
      &lt;div&gt;&lt;strong&gt; Value not found &lt;/strong&gt;&lt;/div&gt;
      &lt;div&gt;&lt;strong&gt; Value not found &lt;/strong&gt;&lt;/div&gt;
      &lt;div&gt;4&lt;/div&gt;
     &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>