title: Can a .ttl Turtle file have two empty prefixes?
body: <p>It it possible to have a Turtle file with two empty prefixes? </p>
  
  <p>Imagine that we have a <code>.ttl</code> file with this prefixes declaration:</p>
  
  <pre><code>@prefix : &lt;http://www.example.com/example#&gt; .
  @prefix ex2: &lt;http://www.ex2.com/ex2#&gt; .
  @prefix ex3: &lt;http://www.ex3.com/ex3#&gt; .
  @prefix : &lt;http://www.empty.com/empty#&gt; .
  ...
  </code></pre>
  
  <p>Where do all the empty prefixes will be resolved: <code>http://www.example.com/example#</code> or <code>http://www.empty.com/empty#</code>?</p>