• From: David Carlisle <davidc@n...>
• To: Dan Shelton <dan.f.shelton@g...>
• Date: Mon, 02 Jul 2012 21:12:10 +0100

On 02/07/2012 19:48, Dan Shelton wrote:
> Does anyone here know whether newlines, form feed or vertical feed are
> valid within an attribute value (I hope not, otherwise it would make
> it a lot harder to write a fast xml parser using regex alone)?

form feed and other control characters 0-31 other than 9,10,13 are
  not allowed in xml 1.0 at all.

newlines can appear in the xml markup for attribute values (but produce 
a space in the value). Newlines can appear in the normalised value for 
an attribute (but have to be marked up as & # 1 0 ; or equivalent.

<a x="1
2"/>
is well formed with the attribute x having value "1 2"

<a x="a&#10;b"/>

is well formed with attribute x having value
"a
b"

David



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• References:
  • newline/form feed valid as attribute value?
    • From: Dan Shelton <dan.f.shelton@g...>