Removing period after number in numbered lists - PDF output

[IF]

Is there a way to change the formatting of  numbered lists in PDF output to remove the period after the number?

Instead of
A. Item 1
B. Item 2
C. Item 3

I would like
A Item 1
B Item 2
C Item 3

or even
(A) Item 1
(B) Item 2
(C) Item 3

All I have been able to do is
(A). Item 1
(B). Item 2
(C). Item 3

using   <xsl:number format="(A)"/>

I don't know how to get rid of the period.
thanks

[IF]

Got it to work eventually. And got tired of doing everything by trial&error so decided to study the list templates. I've attached my rough notes (no guarantee of correctness).

[jgrey]

Well this is a handy reference. Thanks for putting it together.