gtksourceview-2.0 additional syntax package?

Hello.
Recently I was wondering about how to put additional syntax highlighting files
in gtksourceview and found that there are plenty of syntaxes which are rejected
by reasons of no entry in shared-mime-info.
In fact it's no so easy to put a mime definition there even for common
file types
(e.g. assembler sources).
I suggest some subproject like gtksourceview-syntax-extras in which people can
contribute when their syntaxes don't meet the policy of the gtksourceview team.

-- 
Regards, Serguey G Basalaev