[xml] xmllint: validating a document that doesn't specify a DTD

[Murray Cumming <murrayc murrayc com>]

Should I be able to validate an XML document (such as a .glade file)
that has no DOCTYPE line, and therefore doesn't specify a DTD?

When I try it with xmllint, I get this error
  validity error : Validation failed: no DTD found !
even when I have specified a local DTD with --dtdvalid.

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