title: What does 'extended' mean in express 4.0?
body: <p>I'm using express and also body-parser in my app.</p>
  
  <pre><code>app.use(bodyParser.urlencoded({ extended: false }));
  </code></pre>
  
  <p>But, What does 'extended' mean in express 4.0?</p>
  
  <p>I found this  </p>
  
  <pre><code>extended - parse extended syntax with the qs module.
  </code></pre>
  
  <p>However, I still can't understrand what it means.</p>