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Re: PIs within a DTD

> Simple question: is a SAX processor entitled/required to report processing
> instructions from within a DTD (internal or external subset)?

Yes.  The XML spec requires processing instructions be reported to apps,
and doesn't make the strange distinction that DOM does about ones that
are in the DTD vs elsewhere.  (Which seems to be inherited by infoset.)

> The ContentHandler::processingInstruction() documentation makes no mention
> of where PIs may be found.  Contrast this to LexicalHandler::comment() which
> explicitly states that comments from a DTD will be properly nested inside
> start/endDTD events.

ContentHandler is an evolved DocumentHandler, and predates {start,end}DTD()
from the LexicalHandler.

- Dave