My response is in line ...
> 4. XHTML-Print conforming printer should support all attributes.
> (http://www.pwg.org/hypermail/xp/0086.html)
> 
> <FDW> Fujisawa-san's quote leaves out the extremely important context:
> 
> "However, not all the attributes are applicable to a 
> rendering of an XHTML-Print document in a printed media, 
> especially those that are integral to a dynamic display of 
> the document in a browser and the submission of a form. 
> Furthermore, special attention is given to simple printers 
> and some attributes are deemed too complex for a such a 
> printer to render."
> 
> Given the context, the document is simply stating that 
> "things" that don't make sense for printing have to be 
> recognized but their behavior may be null.
> 
> </FDW>
> 
I created a list of all the attributes in XHTML-Print and added a note to
each attribute about why the attribute is or is not required of a printer.
This list is at
http://www.pwg.org/xhtml-print/HTML-Version/attribute_support.htm.
The following attributes are deemed too complex:
align    "td,th,tr" 	"except for justify and char" 
declare  object 		"could require too much memory" 
hreflang link 		no
multiple select 		no 
valign   "td,th,tr" 	"not defined across pages" 
xml:lang I18N 		no 
I think that the decision about complexity and "simple printer" could be the
cause for some debate in the larger, W3C markup group.
Jim Bigelow, 
Editor: XHTML-Print & CSS Print Profile
IEEE, Printer Working Group 
http://www.pwg.org/xhtml-print
Hewlett-Packard
208-396-2068
jim.bigelow@hp.com  
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