title: Query notation for the sitecore 'source' field in template builder
body: <p>I am trying to set the the source field of a template using the query notation (or xpath - whichever works), but none of them seems to be working.</p>
  
  <p>My content tree is a multisite content tree:</p>
  
  <pre><code>France
  --Page 1
  ----Page1A
  -------Page1AA
  --Page 2
  --Page 3
  --METADATA
  ----Regions
  
  US
  --Page 1
  ----Page1A
  -------Page1AA
  --Page 2
  --Page 3
  --METADATA
  ----Regions
  </code></pre>
  
  <p>Each site has its own METADATA folder, and I want it so that when adding a page inside each of the main country nodes, I want the values to reflect whatever is in the METADATA of that site. I have two different fields for now - a droplink and a treelistex field. So I thought I can just get the parent item that is a country site, and get the metadata folder for that. When I put the following query in both the fields, I get different results:</p>
  
  <pre><code> query:./ancestor::*[@@templatename='CountryHome']/METADATA/Regions/*
  </code></pre>
  
  <ul>
  <li>For the droplink field, I get only the first Region (one item)</li>
  <li>For the treelistex field, I get the entire content tree</li>
  </ul>
  
  <p>I then tried to modify the query a little bit and took the 'query' notation out</p>
  
  <pre><code> ./ancestor::*[@@templatename='CountryHome']/METADATA/Regions/*
  </code></pre>
  
  <p>If I go to the developer center/xpath builder, and set the context node to any item underneath the main country site, it returns me exactly what I need, but when I put this in the source, I get the entire content tree in both the cases.</p>
  
  <p>Help!</p>