val elems : 'a table -> 'a list (* return all the data as a list *)
val elemsi : 'a table -> (symbol * 'a) list (* return the symbols with the associated data *)
val keys : 'a table -> symbol list (* just the symbols *)
val elems : 'a table -> 'a list (* return all the data as a list *)
val elemsi : 'a table -> (symbol * 'a) list (* return the symbols with the associated data *)
val keys : 'a table -> symbol list (* just the symbols *)