Ayron said:
Is it possible to have scientific symbols (e.g. degree, squared, cubed,
etc.) in XML docs if the UTF-8 encoding is specified?
Certainly. UTF-8 is capable of representing all characters defined in Unicode
(and, actually, more - you could use Private Use codepoints for your own
characters, though you most probably don't need that).
In addition, you can use character references, irrespectively of the
encoding. Such as ° or (equivalently) for the degree sign.
You don't normally need them, if you can use a UTF-8 capable editor or
another program that can generate UTF-8 encoded XML documents for you.