Registered MIME type?

The Docbook 5 specification [1] registers the
"application/docbook+xml" MIME type.

This MIME type has not yet been registered with IANA.

Are there any plans to do so?

Noah

[1] http://www.docbook.org/specs/docbook-5.0b6-spec-wd-01.html

-- 
"Creativity can be a social contribution, but only in so
far as society is free to use the results." - R. Stallman