ID Phones Type Dep_time) |(1,9) M (1,1) Name Station Has Trip Ariv_time ||(1.4) M (1,1) 1 Location Source Dep_Date Destination Has Ariv_Date City Street hasBooked M M Phone SSN ID |(1.4) (1.1) M Train Ticket Book 1 (0,6) Customer DOB (0,1) Name |(20") (1.1) 1 Name Age contains Fname Lname 1 M (1,1) 1 (0.1) Seat include Price Number Status Class Entity Name customer trip Attribute Description Data dictionary showing all attributes of two entities Data Type Length Nulls Multi-Valued Default Value Range FK PK