title: express-resource mapping elements relationship
body: <p>How can I create a server to manage my entity relationships using node.js and express-resources</p>
  
  <p>I meam, if I have a User entity, I can access it <code>using /user/&lt;user-id&gt;</code>. But how can I define some properties, using this site as example, <code>/user/&lt;user-id&gt;/question/&lt;question-id&gt;</code>?</p>