I was ill nd left this blank, now I will put 3 new attributes to compensate..
1)android:tag
similar to id and can be used to call the object in java using function
"findViewWithTag"
2)android:contentDescription
to provide details of the content of the tag
3)this is not an attribute but an important empty tag
<requestFocus />
the parent gets the initial focus...
use it and you'll get the meaning of it..