Querying the table in 10.1.2, the following is returned

 SELECT * FROM INFORMATION_SCHEMA.SPATIAL_REF_SYS;

+------+-----------------+-----------+--------+

| SRID | AUTH_NAME       | AUTH_SRID | SRTEXT |

+------+-----------------+-----------+--------+

|   -1 | Not defined     |        -1 |        |

|    0 | Cartesian plane |         0 |        |

+------+-----------------+-----------+--------+

According the specs, the table should contain:

srid: The numeric SRID. This should be the table's primary key.
auth_name: An authority name as a string. The documentation email suggested that this should be "EPSG" in most cases.
auth_srid: The numeric ID of the coordinate system in the above authority's catalog.
srtext: The Well-Known-Text (WKT) representation of the coordinate system.