title: What does "did" attribute mean in strings.xml?
body: <p>In one android project: strings.xml,
  There is a value like this:</p>
  
  <pre><code>&lt;string name="string_one" did="string two"&gt;String Demo&lt;/string&gt;
  </code></pre>
  
  <p>Does anyone have an idea what the "did" attribute does?</p>