Tags describe the actual format of the row stream.
        See also 
Biocaml_tags.t.
type [ `format of Biocaml_table.Row.t_type
       | `separator of char
       | `strict_about of [ `cell_type | `row_length ] ] list 
The tags associated with table rows: 
- `separator cadds- cin the list of separators used.
- `strict_about somethingensures that the format is fully
          compliant with- something(example: otherwise the parser may
          ignore some errors to keep going).
- `tail_format arraydescribes the format of the
          columns of the row, if not provided everything is assumed to
          be- `type_string.
 
val separators : t -> char list
Get the list of separators defined in t.
 
val strict_row_length : t -> bool
Tell whether one should be strict about the minimal number of
        cells per row (defined with `format _).
 
val strict_cell_type : t -> bool
Tell whether one should be strict about the types of the cells
        (defined with `format _).
 
val default : t
The default tags define a loose TSV format.
 
val of_string : string ->
       (t, [> `table_row of [> `tags_of_string of exn ] ])
       Core.Result.t
Parse the description of the tags (for now S-Expressions).