| Datalogger_Board |
| Logical Entity Name | Datalogger_Board |
| Default Table Name | Datalogger_Board |
| Definition | Board of a datalogger |
| Datalogger_Board Attributes |
| Attribute/Logical Rolename | Domain | Datatype | NULL | Definition |
| data_id |
NUMERIC(8, 0) | NO | Datalogger identifier. Each datalogger is assigned a unique integer which identifies it in a database | |
| board_nb |
NUMERIC(8, 0) | NO | This attribute denotes the number of boards of a datalogger | |
| serial_nb | VARCHAR(80) | YES | This attribute denotes a serial number of a datalogger board | |
| nb_module | NUMERIC(8, 0) | NO | This attribute denotes the number of modules of a datalogger’s board | |
| firmware_nb | VARCHAR(80) | YES | This attribute describes the firmware number of a datalogger | |
| lddate | DATE | YES | Load date. Date and time that the record was created or last modified, in Oracle date datatype |
| Datalogger_Board Keys |
| Key Name | Key Type | Keys |
| DaB00 | PrimaryKey | data_id, board_nb |
| Datalogger_Board Relationships |
| Parent Relationships: |
| Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Supertype |
| Datalogger | Identifying | One To Zero or More | data_id | NO | |||
| Station_Digitizer | Non-Specific | NO |
| Child Relationships: |
| Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Subtype |
| Datalogger_Module | Identifying | One To Zero or More | NO |
| Datalogger_Board Check Constraints |
| Check Constraint Name | CheckConstraint |
| DaB01 | board_nb >= 1 |
| DaB02 | nb_module >= 0 |