XHTML 1.1 validator rejects xml:space attributes

From: <david.dufour@free.fr> Date: Thu, 04 Oct 2007 12:30:12 +0200 Message-ID: <1191493812.4704c0b4b7692@imp.free.fr> To: www-validator@w3.org · This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 22:59:04 UTC

Hello,

several commercial validators validate the following simple document:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
		<title>Title</title>
	</head>
	<body>
		<p xml:space="preserve">Some text here</p>
	</body>
</html>

W3C validator rejects the xml:space attribute and tells me the document is not
valid XHTML 1.1.

It looks like a bug to me because in XHTML 1.1 DTD, we have:
<!ENTITY % Core.attrib
     "%XHTML.xmlns.attrib;
      %id.attrib;
      %class.attrib;
      %title.attrib;
      xml:space    ( preserve )             #FIXED 'preserve'
      %Core.extra.attrib;"
>

Moreover, why this attribute has been added in XHTML 1.1 is explained in W3C
FQA:
"Why is xml:space set to 'preserve' on all elements of XHTML?"

Best Regards,
David