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Bob Foster scripsit: > The only thing I am aware of that XML Schema provides that RELAX NG (with > the DTD extension) does not are identity constraints (unique/key/keyset). Attribute and element content defaulting, too. But XSLT can do that easily. -- John Cowan <jcowan@r...> www.ccil.org/~cowan www.reutershealth.com Micropayment advocates mistakenly believe that efficient allocation of resources is the purpose of markets. Efficiency is a byproduct of market systems, not their goal. The reasons markets work are not because users have embraced efficiency but because markets are the best place to allow users to maximize their preferences, and very often their preferences are not for conservation of cheap resources. --Clay Shirkey
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