URL is the URL for mixi access point of the group. When URL is friend's, get
his/her diaries as article. When community's, get its BBSes. When diary's
or BBS's, get its comments.
-FUNCTION is the function having one `range' argument for getting articles."
+FUNCTION is the function which has one `range' argument and returns the list
+of mixi object."
:group 'shimbun
:type '(repeat (cons :fromat "%v"
(string :tag "Group name")