Control Characters

[John Cowan]

Eric Hellman scripsit:

> Why are the control characters x80-x9F allowed in XML character data, while
> x0-x8,xB,xC,xE-x1F are illegal?

No good reason.  I think there was a desire to keep the SGML declaration
short.

> Has "BEL" been banished to a "Unisound" encoding ?;--}

I think it would be most useful to replace it with an empty element
<BEL/>.
 
> I have a DTD in which some entities are given the default value xFFFD in
> the external subset because they are placeholders for strings to be
> supplied in an internal subset with the document. Is this an appropriate
> use of Unicode's "replacement character"?

It's unusual but not erroneous.

-- 
John Cowan	http://www.ccil.org/~cowan		cowan at 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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