You can find many Tag fields in Asset and System studio but behaviour is not same - some accepts text, some xml. For example every tag field (3) in Record is textual, but Collection's tag accepts xml.
It would be great to make some distinction between those two Tag fields so user can clearly tell what data he/she can fill in.
For now, we solved it by change of the label (via translation), but it could come out of the box.
Customer support service by UserEcho