1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 2"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 3 4<html xmlns="http://www.w3.org/1999/xhtml"> 5<head> 6<title>[ #443362 ] null-pointer except. for doctype in pre</title> 7</head> 8 9<body> 10<h1>Unofficial W3C Validator FAQ</h1> 11<p>This is a list of frequently asked questions and answers asked on the 12<a href="http://lists.w3.org/Archive/Public/www-validator-css/" 13title="Mailing list archive">www-validator-css@w3.org mailing list</a>. 14 15<h2> 16What does "<code>org.xml.sax.SAXException: 17Please, fix your system identifier (URI) in the DOCTYPE rule.</code>" mean? 18</h2> 19 20<p>Your XHTML document contains a document type 21declaration but the system identifier points at some 22non-W3C URI. Your document probably contains something 23like this: 24</p> 25<pre> 26<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 27"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 28 29</pre> 30</body> 31</html>