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   RE: ASCII control characters in XML

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  • From: "James K. Tauber" <jtauber@jtauber.com>
  • To: <xml-dev@ic.ac.uk>
  • Date: Wed, 29 Apr 1998 01:19:56 +0800

At 09:21 AM 4/28/98 -0700, Steve Harris wrote:
>Is it possible to transport UTF-8-encoded text that includes some
>characters in the byte range x0000-x001F (ASCII control characters)?
>These codes are valid within UTF-8 (via RFC2044), but the XML
>specification clearly says that these codes do not constitute 'valid

You can't transport them in a way that an XML processor would recognize them
as being in that range and part of a parsed entity.

You could use processing instructions; something like <?char x0007?> and
rely on the application to recover the characters.

Also, you could define appropriate unparsed entities and then refer to them
by attribute <char val="x0007"/> (having previously defined x0007 to be an
unparsed entity and val to be an entity attribute).


James Tauber / jtauber@jtauber.com
Perth, Western Australia
XML Pages: http://www.jtauber.com/xml/

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