HTML.Reserved - additional checking? datapagesize, event, for

Hi,

I have discovered yesterday that the HTML 4.01 DTD had a surprising  
section
http://www.w3.org/TR/html4/sgml/dtd.html#HTML.Reserved

<!-- Reserved Feature Switch -->
<!ENTITY % HTML.Reserved "IGNORE">
<!-- The following attributes are reserved for possible future use -->
<![ %HTML.Reserved; [
<!ENTITY % reserved
  "datasrc     %URI;          #IMPLIED  -- a single or tabular Data  
Source --
   datafld     CDATA          #IMPLIED  -- the property or column  
name --
   dataformatas (plaintext|html) plaintext -- text or html --"
   >
]]>
<!ENTITY % reserved "">

But these features being not part of the specification are not  
conformant per se.
The validator reports them as invalid. GOOD!

BUT there are other reserved attributes in the spec which are flagged  
as valid

On table element
datapagesize CDATA         #IMPLIED  -- reserved for possible future  
use --

On script element
event        CDATA         #IMPLIED  -- reserved for possible future  
use --
for          %URI;         #IMPLIED  -- reserved for possible future  
use --

See the test case for validation.

-- 
Karl Dubost - http://www.w3.org/People/karl/
W3C Conformance Manager, QA Activity Lead
   QA Weblog - http://www.w3.org/QA/
      *** Be Strict To Be Cool ***