xslt and fo process

[MARTIN Franck]

Hello,   Is there any way to transform the value returned by the instruction <fo:page-number/> before printing it? Let's say i would like to double it and then print the result, could i use an xsl:variable or not?   Fop is able to process a fo file directly but it is also able to process a xsl file and a xml file. In the cas i give fop 2 files to process (xml+xsl), will it always give the same result as giving it the fo file (obtained from the xml and xsl)??   Franck