title: Analytics Experiments Dynamic URLs
body: <p>I have a lot of product pages like this:</p>
  
  <pre><code>www.example.com/catalog001/item123
  www.example.com/catalog002/item321
  www.example.com/catalog002/item567
  </code></pre>
  
  <p>Every catalog and product(item) have its own numeric id.</p>
  
  <p>Product pages are similar. Just different product image, price, title.</p>
  
  <p>I tried to use Regular Expressions to set up original url pattern in Analytics Experiments:</p>
  
  <pre><code>www.example.com/catalog(\d+)?/item(\d+)?
  </code></pre>
  
  <p>Is there any way to set up original url pattern?</p>