CSS and XSL

[RBCC]

How do I use css in this code?
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="

http://www.w3.org/1999/XSL/Transform"

xmlns:xs="

http://www.w3.org/2001/XMLSchema"

exclude-result-prefixes="xs"
version="2.0">
Where do I put the css file in this line? John

 

[tsuji]

>Where do I put the css file in this line?
What do you mean by putting a css file in the xsl:stylesheet line? What for?