My friend's teacher asked her to outline in a different style than she...

[newjediorder_1221]

...knew,what style is this (click through) She was asked to use the following style:

I
a.
b.
II
a.
b.



Whereas we've been taught the (presumably) MLA:

I.
A.
i.
ii.
B.
i.
ii.


Is this a different stylesheet or something? Is this not even another stylesheet? She's really confused, and I can't think of it off the top of my head.
*sigh*...Unfortunately, Yahoo Answers took out my spaces. See if this works.

I
--a.
--b.
II
--a.
--b.

and

I.
--A.
------i.
------ii.
--B.
------i.
------ii.

Thanks!
Thanks, L.G.! I appreciate your answer! However, for all those who will (hopefully!) answer, I was wondering if that style the teacher wanted to use seemed familliar to anyone, or had a name?