xml-dev - DTD Processor?

[David Wang <dwang@mitre.org>]

I realize that this may sound ancient, crufty, and crazy, but bear with me
briefly while I explore this thought... :-)

I wanted to know if there is a parser and otherwise exposed "object model" for
DTDs so that DTDs can be programmatically traversed and examined.

I realize that such facilities must exist in the bowels of any XML parser
since it needs to do this sort of thing to validate any XML instance document,
but I'm not aware if these facilities are exposed outside the validating
parser.

The reason I'm thinking about this is:
Just as SAX and DOM allows me to programmatically fiddle around and examine
the elements and attributes of an XML instance document (such as nodes, etc),
I can technically apply the same facilities on an XML-Schema document since
it's valid XML.  Thus, I wonder if there exists such facilities for DTDs...

Thanks,
/David


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