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   DTDDeclHandler and DTDLexicalHandler

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  • From: David Megginson <david@megginson.com>
  • To: "XML Developers' List" <xml-dev@ic.ac.uk>
  • Date: Fri, 26 Mar 1999 08:34:47 -0500 (EST)

Ronald Bourret writes:

 > This may have already been answered, but how do DTDDeclHandler and 
 > DTDLexicalHandler work together?  That is, if I have the following:
 > <!ENTITY % foo "foo CDATA #REQUIRED">
 > <!ATTLIST bar %foo;>
 > what is the sequence of callbacks?

You'll lose the entity-boundary information in this case.  What you'd
get back is

  internalEntityDecl("foo", true, "foo CDATA #REQUIRED");
  attributeDecl("bar", "foo", "CDATA", null, ATTRIBUTE_REQUIRED, refs);

 > And even if this is well-defined, what good is the lexical
 > information in this case anyway, since I can't determine what
 > characters in the DTD came before and after the entity usage.

You're right, but I think that we're taking this too far for the SAX
core.  SAX2 is specifically set up so that people can define new
handler types, so it is possible to come up with something that
provides this level of reporting, but it will have to be outside of
the SAX core.

All the best,


David Megginson                 david@megginson.com

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