<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:myapp="http://schemas.android.com/apk/res/***.****"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:id="@id/RelativeLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffffff" >
i want to know what is role of xmlns:myapp="http://schemas.android.com/apk/res/my-app-name"... what is need of this , how it works, please help.........