Originally posted by mpjbrennan
It isn't just w3schools that use the link
<?xml-stylesheet type="text/xsl" href=some_file.xsl"?>
- Michael Kay also uses it in his book "XSLT" 2nd edition. Most people regard this as a fairly definitive work.
Well it is technically incorrect. I think it is common practice because IE requires it (? I don't actually remember if it transform with type="text/xml" or not...), and Mozilla is smart enough to use the real mime-type of the file.