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   Re: control characters

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  • From: Matt Sergeant <matt@sergeant.org>
  • To: Mark Volkmann <volkmann@inlink.com>
  • Date: Sat, 17 Jun 2000 21:04:46 +0100 (BST)

On Sat, 17 Jun 2000, Mark Volkmann wrote:

> I've never seen a discussion of the reason why most ASCII control
> characters, such as a form feed, are not allowed in XML documents. Can
> anyone tell me the reason behind that decision or point me to a spec. that
> explains that?

Two possible reasons:

1. They are unnecesary in XML - why have invisible codes when you can
substitute <formfeed/> or <bell/>.

2. They can be useful in streamed XML as a record separator - e.g.:


This sort of stream is dead easy to process with Perl's XML::Parser, for
example, where you can just set the "StreamDelimiter" variable to ^L and
the parser does the right thing.


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