let register uri = (map_of_uri uri )#add uri in
let return_all_foo_uris map doctype filter outchan =
(** return all URIs contained in 'map' which satisfy predicate 'filter'; URIs
let register uri = (map_of_uri uri )#add uri in
let return_all_foo_uris map doctype filter outchan =
(** return all URIs contained in 'map' which satisfy predicate 'filter'; URIs