some variables in xml have a 'dot'

adukets

New Member
I am now studying a opensource android mobile browser, notice some variables in xml have a 'dot' to define a long name variable.such as: \[code\]TextView android:id="@+id/BookmarksListActivity.EmptyTextView"\[/code\]and i notice the reference in \[code\]*.java is *BookmarksListActivity_EmptyTextView*\[/code\]is it a correct way to use the variables like that?
 
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