F.Y.I.
Finally I've added the method to get partners from bookmark in
tla--name-read.
Now tla--name-read supports following keys:
(define-key map [(control r)] 'tla--name-read-refresh-cache)
(define-key map [(meta *)] 'tla--name-read-insert-default-archive)
(define-key map [(meta \.)] 'tla--name-read-insert-info-at-point)
(define-key map [(meta \;)]
'tla--name-read-insert-version-associated-with-default-directory)
(define-key map [(control n)] 'tla--name-read-insert-partner-next)
(define-key map [(control p)] 'tla--name-read-insert-partner-previous)
(define-key map [(control v)] 'tla--name-read-insert-bookmark-next)
(define-key map [(meta v)] 'tla--name-read-insert-bookmark-previous)
(define-key map [(meta ^)] 'tla--name-read-insert-ancestor)
Masatake