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Re: Ambiguity in XML spec

• From: Steve Schafer <pandeng@t...>
• To: xml-dev@x...
• Date: Fri, 19 May 2000 09:59:03 -0500

On 19 May 2000 13:09:24 GMT, richard@c... (Richard Tobin)
wrote:

>The grammar in the spec describes the language correctly, and the
>productions in question can be used directly with compiler-generators
>like yacc.

That's simply not true. yacc generates parsers for LALR(1) grammars,
and the grammar in the XML spec is not LALR(1), unless, as I mentioned
earlier, you omit at least some of the regular expression-based
productions.

If you _do_ omit those productions, then you need to have a lexical
analyzer that can handle them, and there is no _single_ lexical
analyzer that can handle all of them, because the rules for
tokenization are strongly dependent on context.

-Steve Schafer


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