Utility - availability
           Note: The X icon indicates Yes. In Mode columns, X indicates that the fields are optional in the specified operation. Where noted as mandatory, the field is required in the specified action.
          
         | Type | Length | PK | FK | Mode | Mandatory | Remarks | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Table | Field | Read | Write | Delete | Create | Update | |||||
| available | STRING | 80 | X | X | |||||||
| code | STRING | 80 | X | utility | code | X | X | ||||
| model name | STRING | 80 | X | utility, time period | model name | X | X | ||||
| time period | STRING | 80 | X | time period | code | X | X | ||||
| use default | BOOLEAN | X | X | ||||||||