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The maximum for xml is 0x10ffff.
You may want to think in terms of utf-8 encoding.
One characteristic of utf-8 is that it preserves the order
of strings. In other words, if code(A) < code(B), then
utf-8(A) < utf-8(B) when compared as a sequence of unsigned
8 bit bytes.
On Aug 13 07:19, Alan Gutierrez <firstname.lastname@example.org> wrote:
> Subject: Re: [xml-dev] XML Max Character Value
> * Bob Foster <email@example.com> [2005-08-13 02:55]:
> > Alan Gutierrez wrote:
> > > I'm implementing B-Tree to index XML documents. I'd like a
> > > to use maximum character value as a boundry, or failing that a
> > > minimum character value.
> > I believe the current Unicode character range, and the one that was
> > effective for the XML 1.0 standard, is 0x20-0x10000 (note 17 bits) plus
> > the control characters, '\t' and '\n' and minus the surrogate pair range
> > and 0xFFFF and 0xFFFE.