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   RE: [xml-dev] What is the rule for parsing XML in a namespace inside HTM

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It isn't a data island.  It is non-HTML in the renderer.
To be specific, it is VML inside HTML using the CSS behavior 
support and the xmlns declaration, per the manual.

What happened was a comment became denested (missing end 
comment decl) and was not noticed because the values for 
the VML were hardwired, so the rendering looked ok.  While 
adding a feature, it became apparent that something wasn't 
right with the original.  The missing end comment decl 
was picked up by a later comment and that effectively 
commented out the good code.  So a bug was acting like a 
feature in the instance. NBFD, I can fix these but it 
occurred to me that the VML was malformed and the 
browser didn't gripe about it.  So I thought, sure 
it's inside the HTML but it really isn't. (is  
namespaced markup actually inside markup with a 
different namespace; not really).   

Then it occurred to me the browser doesn't actually 
know the difference if it isn't in an XML document.

I dunno Joshua.  It seems to me that grandfathering 
HTML leads to problems worse than actually creating 
an XML browser that knows it is one.  My particular 
bug is fixable, but it tells me that when using 
XML inside non-XML, I can't trust rules I thought 
I could trust.  It should know that the VML is an 
XML app, but wow... it hurts my brain to think 
about how that would work while still grandfathering 
HTML tag stacking.


From: Dare Obasanjo [mailto:dareo@microsoft.com]

> > The subject says it.   If HTML has an XML 
> > namespace inside it, is the Draconian parse rule still in effect?
> Exactly how do you embed XML inside HTML let alone just XML 
> namespaces? 

By the way I do know you can do this in an IE specific manner using XML
data islands[0] but I'd assumed this was non-standard and unsupported in
other browsers. 

[0] http://www.w3schools.com/xml/xml_data_island.asp


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