[XML-SIG] Re: [Zope] - Re: [XML-SIG] RE: [Zope] - XML-style DTML code
Fred L. Drake
Fred L. Drake, Jr." <firstname.lastname@example.org
Fri, 29 Jan 1999 10:40:22 -0500 (EST)
Christopher G. Petrilli writes:
> Wouldn't the DTD restrict the use of < inside? I thoguht the spec
> required that except inside a couple things ... like PIs... that the <
> and & characters must be escaped?
Hmm... not the DTD, but you got me: the XML spec may well restrict
the use of < and & in quoted attribute values. While avoiding some of
the delimiter-in-context rules from SGML for the benefit of parser
implementors, we end up with some ugly markup. ;-(
> > > <font size="&arg;">
> > In neither SGML nor XML can markup be nested like this. The use of
> > entities is the proper way to do this in either case. Perhaps a
> > processing tool needs to be available which can perform "entity
> > expansion" for specified entity names only?
> I'm confused by what you mean here, being a newbie to XMLish things.
I meant that '<foo bar="<!-- ... -->">' (SGML this time!) did not
contain nested markup. (Same for the PI in an attribute value.)
'<foo bar="&arg;">' does contain nested markup, but not nested
My thought was that a tool could be written which would convert:
<!DOCTYPE thing PUBLIC "..." [
<!ENTITY frob CDATA "replacement text">
<!DOCTYPE thing PUBLIC "...">
Such a tool could perform expansion on either all the entities
defined in the internal subset (the stuff in [ ... ] in the DOCTYPE
declaration), or allow the user to specify a list of names (and
possibly values) from another source.
Fred L. Drake, Jr. <email@example.com>
Corporation for National Research Initiatives
1895 Preston White Dr. Reston, VA 20191