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   Re: SAX: Next Round

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  • From: John Cowan <cowan@locke.ccil.org>
  • To: XML Dev <xml-dev@ic.ac.uk>
  • Date: Wed, 20 Jan 1999 17:36:05 -0500

David Megginson scripsit:

> I'd like to lose EntityResolver and DTDHandler (who uses them?), but I
> don't know if we can.

Nope, nope, nope.  In particular, I still have a project to finish
a standard EntityResolver that understands Socats.  By having such
a thing, you can fit Socat support into arbitrary applications using
arbitrary SAX parsers.  Keep it.  As for DTDHandler, it exposes
stuff that XML 1.0 requires a parser to expose.
> 1. Filter Interface

I propose a fourth alternative: provide ParserFilter as a helper
class, and don't have a separate interface.  Parser filters are
just parsers that have a "parser(Parser)" constructor.

One particularly nice feature of this is that it is the pattern
used by Java {Input,Output}Streams and Readers/Writers: Chain of

> 2. Lexical Event Handler

I'll post on this later.

John Cowan	http://www.ccil.org/~cowan		cowan@ccil.org
	You tollerday donsk?  N.  You tolkatiff scowegian?  Nn.
	You spigotty anglease?  Nnn.  You phonio saxo?  Nnnn.
		Clear all so!  'Tis a Jute.... (Finnegans Wake 16.5)

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