sig
val compute : Stog_types.stog -> Stog_types.stog
val succ_by_date :
Stog_types.stog -> Stog_types.Graph.key -> Stog_types.Graph.key option
val pred_by_date :
Stog_types.stog -> Stog_types.Graph.key -> Stog_types.Graph.key option
val dot_of_graph :
(Stog_types.doc -> Neturl.url) -> Stog_types.stog -> string
val remove_not_published : Stog_types.stog -> Stog_types.stog
end