Cascading Style Sheets/Applying CSS to XML

To apply a stylesheet to an XML document, place the modified following example into the prolog of the XML document.

 <?xml-stylesheet href="style.css" type="text/css"?>

Any XML declaration, such as <?xml version="1.0" encoding="UTF-8"?>, must precede the stylesheet processing instruction.

This applies to XHTML too, if it is served with the correct MIME type: application/xhtml+xml.

A complete example, with an XML declaration and a stylesheet processing instruction:

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="rss_style.css" type="text/css"?>
<rss version="2.0">
  <channel>
    <title>My news feed</title>
    <link>http://my.news/</link>
    <description>Latest news</description>
    <language>en-gb</language>
    <copyright>Me</copyright>
    <pubDate>Wed, 06 Sep 2006 00:00:00 GMT</pubDate>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
  </channel>
</rss>

Bibliography

XML - Managing Data Exchange/XSLT and Style Sheets