| Name | Type | Index | Null? | Default | 
| grkey | int(11) ++ | PK | No |  |  | 
| owner | varchar(240) | I |  | NULL | Defines type of group: "CONF", "MGR", or an actual (lower-case) userid. 
 | 
| name | varchar(240) | I |  | NULL | Name of group.  For CONF groups, it is the conference number. 
 | 
| userid | varchar(240) | I |  | NULL | User groups only: the userid (or wild card string) for this rule. 
 | 
| wildcard | tinyint(1) |  |  | '0' | User groups only: 1 if wildcard, 0 otherwise. 
 | 
| subowner | varchar(240) |  |  | NULL | For sub-groups rules: the sub-group's owner. 
 | 
| subname | varchar(240) |  |  | NULL | For sub-groups rules: the sub-group's name. 
 | 
| access | int(11) |  |  | '0' | Access level, coded as an integer.  (give examples: unknown) 
 | 
| optional | tinyint(1) |  |  | '0' | 0 => normal, 1 => this is an "opt (in or out)" rule. 
 | 
| bySelf | tinyint(1) |  |  | '0' | 1 if this rule was added by the user that affects it. 
 |