I think, you can use the '-' operator to accomplish this (shown below):

<fo:page-number/> - 1 // <fo:page-number/>

but if you need to handle page 1 in a special way, where if you do not
want to display '0 //' before 1, this simple way may be difficult to
handle this case.

I am not a good expert here, but this hint might help you get started.

On 2/27/07, Ranjitha Murthy Rao <ranjithamrao@xxxxxxxxxxx> wrote:

I need to display the page number in the following format :
<previous_pageNumber> // <current_page Number>

For example:
On page 3, I need to display:
2 // 3
and on page 5
4 //5

We are using for 0.20.4 and xsl version 1.0
Thanks in advance,
Ranjitha Rao

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