Comment 37 for bug 191199

Except that you can't, see the fourth line in that section (or any of the other thousands of places googling "form feed xml" will show you people being shocked to find they can't "just use XML" to wrap any data). You simply *cannot* represent a form-feed in XML 1.0 content. You can use , to turn an actual form-feed character into the literal string "&x12;" if you find that noisy dataloss is better than silent dataloss, but you can no more use  than you can use the actual character.

(Thanks to its desire to be as incompatible and unused as possible, you actually can have  in your XML 1.1, though good luck finding anything to consume XML 1.1 :)