Datalogger_Module 
Logical Entity Name  Datalogger_Module 
Default Table Name  Datalogger_Module 
Definition  Module of a datalogger’s board 

Datalogger_Module Attributes 
Attribute/Logical Rolename  Domain  Datatype  NULL  Definition 
data_id(PK)(FK)    NUMERIC(8, 0)  NO  Datalogger identifier. Each datalogger is assigned a unique integer which identifies it in a database 
board_nb(PK)(FK)    NUMERIC(8, 0)  NO  This attribute denotes the number of boards of a datalogger 
module_nb(PK)    NUMERIC(8, 0)  NO  This attribute represents the module number of a datalogger’s board 
serial_nb    VARCHAR(80)  YES  This attribute denotes a serial number of a datalogger module 
firmware_nb    VARCHAR(80)  YES  This attribute describes the firmware number of a datalogger 
sensitivity    FLOAT  YES  This attribute denotes the sensitivity (Sd) for a sensor or a digitizer 
lddate    DATE  YES  Load date. Date and time that the record was created or last modified, in Oracle date datatype 

Datalogger_Module Keys 
Key Name  Key Type  Keys 
DaM00  PrimaryKey  data_id, board_nb, module_nb 

Datalogger_Module Relationships 
Parent Relationships: 
Entity Name  Type  Cardinality  Business Name  VerbPhrase  InversePhrase  Foreign Keys  Is Supertype 
Datalogger_Board  Identifying  One To Zero or More        data_id, board_nb  NO 
Child Relationships: 
Entity Name  Type  Cardinality  Business Name  VerbPhrase  InversePhrase  Foreign Keys  Is Subtype 

Datalogger_Module Check Constraints 
Check Constraint Name  CheckConstraint 
DaM01  board_nb >= 1 
DaM02  module_nb >= 1