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lines 469-496 of file: xrst/all_node_db.xrst
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{xrst_begin split_reference_table}

Split Reference Table
#####################
This table specifies the possible reference values for the splitting covariate.
If this table is empty (is not empty),
the :ref:`option_all_table@split_covariate_name`
must not appear (must appear).

split_reference_id
******************
is the :ref:`all_node_db@Primary Key` for this table.

split_reference_name
********************
This column has type ``text`` and contains a name attached
to each of the splitting covariate reference values.

split_reference_value
*********************
This column has type ``real`` and contains the possible reference values for
the splitting covariate.

Example
*******
see the csv.module :ref:`csv.module@split_reference_table` .

{xrst_end split_reference_table}