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At 3:46 PM -0400 7/23/01, Ann Navarro wrote: >At 03:09 PM 7/23/2001 -0400, Elliotte Rusty Harold wrote: >>At 2:24 PM -0400 7/23/01, Ann Navarro wrote: >> >> >Correct. But are you not arguing that a member of the subset not be able to claim membership in the superset unless it uses a feature outside the intersection? >> > >> >>Yes, that's precisely what I'm arguing. I think that's the most compatible, least painful approach. > >How to you propose to prohibit it in a validating fashion? > It's trivial. The parser has a boolean flag that says whether or not a Blueberry character has been seen which is initialized to false when the parser starts reading a document. If the parser get to the end of the document, and that flag is still false, it reports a well-formedness error, in whatever way well-formedness errors are normally reported by the parser. -- +-----------------------+------------------------+-------------------+ | Elliotte Rusty Harold | elharo@m... | Writer/Programmer | +-----------------------+------------------------+-------------------+ | The XML Bible, 2nd Edition (Hungry Minds, 2001) | | http://www.ibiblio.org/xml/books/bible2/ | | http://www.amazon.com/exec/obidos/ISBN=0764547607/cafeaulaitA/ | +----------------------------------+---------------------------------+ | Read Cafe au Lait for Java News: http://www.cafeaulait.org/ | | Read Cafe con Leche for XML News: http://www.ibiblio.org/xml/ | +----------------------------------+---------------------------------+
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