• To: "'ht@c...'" <ht@c...>, xml-dev@l...
• Subject: RE: ID/IDREF makes XML generation NP-hard
• From: "Bullard, Claude L (Len)" <clbullar@i...>
• Date: Fri, 28 Mar 2003 16:41:17 -0600

That's neat, Henry, and I don't mean to be mean-spirited, 
but is this a "so, but so what?" kind of thing to know? 

len

-----Original Message-----
From: ht@c... [mailto:ht@c...]

Somewhat surprisingly, it turns out that answering the question, for an
arbitrary XML DTD, "Are there any valid instances of the document type
defined by this DTD?", is an NP-hard problem.

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