title: Must a new line follow the XML declaration?
body: <p>Is this one a valid XML instance? It has nothing between the the XML declaration and the root node.</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;&lt;data&gt;&lt;/data&gt;
  </code></pre>
  
  <p>I could not find the right place in the XML specification myself and hope that somebody will help me...</p>