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> Winchel 'Todd' Vincent, III wrote: > >A further thought . . . to be manageable, it seems to me that this would > >require a registry of prefixes for the particular industry. Assuming a > >registry were possible, would namespaces and DTDs mix? It is a good idea for specs to have a preferred prefix. That is because a name in markup is a name, and a good name is readable. A string with "xsl" is a good prefix for an XSL element, for example. An XML DTD is a limited, fully-resolved structural schema for that instance. It gives one lexical form for a document that uses elements from a set of namespaces. In a sense, a DTD is not a schema at all, in the way some people think of schemas: it is a way of removing constants to headers and signifying how to interpret certain attribute values as the ends of links (rather than being a way to constrain relationships between arbitrary information items, or being a way to map between storage/access technology and the DOM, or of providing datatyping). Rick Jelliffe
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