| `String of string
| `Null ]
- (** @param about uri of object whose metadata are about
- * @return columns for Sort, Rel, and Obj respectively *)
-val columns_of_metadata:
- about:string -> MetadataTypes.metadata list ->
- t list list * t list list * t list list
-
(** @return columns for Sort, Rel, and Obj respectively *)
-val columns_of_ind_metadata:
+val columns_of_metadata:
(string * string * MetadataTypes.metadata list) list ->
t list list * t list list * t list list