title: What does 'parent' mean in styles.xml?
body: <p>What does <code>parent="android:Theme.Holo"</code> mean in <code>res/values/styles.xml</code>? </p>
  
  <pre><code>&lt;style name="activated_dark_item" parent="android:Theme.Holo"&gt;
      &lt;item name="android:background"&gt;@drawable/mDrawable&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>