title: What does the ? in Android XML mean
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2733907/question-mark-in-xml-attributes-for-android">Question mark (?) in XML attributes for Android</a>  </p>
  </blockquote>
  
  
  
  <pre><code>&lt;TextView android:id="@+android:id/title"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:singleLine="true"
          android:textAppearance="?android:attr/textAppearanceLarge"
          android:ellipsize="marquee"
          android:fadingEdge="horizontal" /&gt;
  </code></pre>
  
  <p>what does "?android:attr/textAppearanceLarge" do? Does it have a name? Why doesn't it use an "@" instead? Can I use this syntax in my own code? Where can I read more about this? Since I don't know what it is, it's kind of hard to find more information about it. Any guidance would be greatly appreciated. </p>