here is a line in layout file
<code><TextView
android:id="@+id/username"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="@string/username"
android:textAppearance="?android:attr/textAppearanceMedium"</code>>
in about context what is the exact meaning of android:textAppearance="?android:attr/textAppearanceMedium"
is that related to "?[package:][type:]name" , if yes then what that refers to ?