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>