Parser compliance

James Tauber jtauber at
Thu Nov 18 04:25:41 GMT 1999

> [Tim Bray:]
> > I have often wondered where this myth arose that validating against
> > a DTD will tell you, in useful real-world terms, "what's wrong with
> > your XML".

Well, I think DTDs and other schemata can be useful (I would have less
error-checking code in FOP if I used a validating parser), but I agree that
a myth has arisen that DTDs (and especially schemata in new schema
languages) do a lot more than they actual do. My favourite myth is that a
schema tells you what an XML document means.

Last week I ran a course at SD99 on practical DTD design and my first slide
was a list of the things a schema *doesn't* do. There's a lot of
myth-busting to be done.


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