[Zope3-dev] Re: XML header and TAL interpretor

[Tonico Strasser]

Fred Drake schrieb:
> On 8/31/05, Philipp von Weitershausen <philipp at weitershausen.de> wrote:
> 
>>HTML4 mode exists because
> 
> ...
> 
>>- it enforces some HTML document type (as mentioned before); no idea why
>>it does that
> 
> 
> I'm just guessing you're referring to its understanding of the allowed
> nesting structures.  This is done so that the partial well-formedness
> it requires mixed with the careless infliction of pain commonly
> performed by old-style HTML authors produces as few surprises as
> possible.  The only well-formedness it directly enforces is for
> elements that actually have TAL, METAL, and I18N attributes.  Whether
> this was the right thing to do is debatable.
> 
> Another reason for the HTML mode is that many of the HTML editors
> deployed when we first developed TAL were not generating XHTML, and
> weren't expected to do so in the immediate future.  We definately
> wanted page templates to be editable in WYSIWYG-type editors.

And, as long pages are served as text/html they are treated as old-style 
HTML by browsers anyway[1].

XHTML pages served as text/html must follow the compatibility 
guidelines[2]. E.g. in ZPT HTML mode, elements like <br/> will be 
converted to <br /> automagically (with space before the slash). That is 
a good thing IMHO.

[1] Serving XHTML 1.0
<http://www.w3.org/International/articles/serving-xhtml/>

[2] HTML Compatibility Guidelines
<http://www.w3.org/TR/xhtml1/#guidelines>

Tonico