Display the value '??' in strings.xml
<p>I have a little problem but I have no answer. I use the strings.xml to store all texts from my application. If i want save the next value : '??' so I have an error when I execute my app.</p>

<pre><code>&lt;string name="unknown_text"&gt;??&lt;/string&gt;

error: Error: No resource found that matches the given name (at 'unknown_text' with value '??').
</code></pre>

<p>Is there a solution to save this value in xml or I must use setText() for all widgets which need it ?</p>

<p>Thx</p>
