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Re: [xml-dev] XML 2 so far

On Dec 12, 2010, at 19:45, Amelia A Lewis wrote:

> XML is, by design, 
> extensible.  To be so, it has to be more draconian, because there are 
> no reasonably imputed semantics for unknown tags (or even for unknown 
> attributes).  Specifying "must ignore" could work for some fields.  It 
> doesn't for all.

I'm not suggesting vocabulary-aware error recovery. I'm suggesting the tokenizer should always transition in a well-defined way on any input character (like the HTML5 tokenizer does) and the tree builder should discard end tag tokens without a matching item on the stack or if there is a matching item on the stack, pop until that item has been popped. (Dealing with unbound prefixes doesn't have such a nice solution, unfortunately.)

Henri Sivonen

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