Suggestion:
a) eliminate text/xml
b) eliminate 'charset' parameter from application/xml
The charset is self-identifying. If there is a PUA in use,
then it must be declared in the head of the XML body.
Having PUAs in your charset is like having a private use
font.
Makoto wrote:
If the charset parameter is not present, we cannot use negotiation
of HTTP 1.1, which is already available.
Note that the encoding declaration is not mandatory for XML. An XML
document does not necessarily have to start with an XML declaration.