reset increment on attribute value change

Hi there,

   I have the following XML structure:

<a name="1">
..
..
..
</a>
<a name="2">
..
..
..
</a>

I have repeatable b and c elements within each a (c
within b).

My XSL consists of a for-each "a". My goal is to have
an incremented value for each c where a[@name="1"] and
then start over with the next a where @name="2".

Put simply, I need to reset the incrementing when the
attribute for a changes value.

Right now, I am using the position function for c, but
the problem with that is it starts over when I have a
new b, not a new a, since c is within b.

Any help would be appreciated.

Best Regards,

Jonathan Marenus

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