fixing (just) namespaces and validation

David Carlisle davidc at
Wed Sep 8 14:08:56 BST 1999

Me> Surely _all_ DTDs do have this problem with the namespace REC.
David Megginson> That's because they're different layers.  

Yes, agreed, it wasn't really a criticism. The fact remains that at the
current time the `problem' is that there is no standard way of getting
from one layer to the other.

That is, if I have a namespace aware application that really doesn't
mind what prefix is used in a document instance, there is no convenient
standard way of supplying a DTD against which a set of documents to be
used with that application may be validated.

Of course it's easy enough to _do_ the validation, you just need to
specify (for example) an XSL transform that normalises the prefix to
match the DTD or just build this knowledge in to an extended XML parser
but there is nothing like the following that works in a cross platform

  this instance uses document element foo:x
  but validate against this dtd which declares element x
  SYSTEM "x.dtd">
<foo:x xmlns:foo=...>


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