[Orgmode] higher level headline as category

[Eraldo Helal]

In my custom agenda: Is there a way to get the higher(by1level) headline as prefix?

Demonstration:

test1.org:

* headline1
** TODO headline2
** TODO headline3

test2.org:

* headline4
** headline5
*** TODO headline 6
** TODO headline 7        :tag1:

agenda:

headline1    TODO headline2
headline1    TODO headline3
headline4    TODO headline7        :tag1:
headline5    TODO headline6

That would be a supercool feature for my use. :)

Greetings from Austria,
Eraldo (spreading the Org virus)