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The Entity-Relationship Diagram (ERD) for a Railway Reservation System is a graphical representation of the entities involved in the system and the relationships among them. This system facilitates booking of train tickets, handling of user data, train schedules, seat availability, and transaction details. Below is a detailed explanation of the ERD with necessary assumptions and components, written in the context of Systems Analysis and Design. --- ### Assumptions: 1. The system serves registered users (passengers) who can search for trains, book tickets, and make payments online. 2. Trains run on fixed schedules and consist of multiple coaches and seat types (e.g., Sleeper, AC, General). 3. Tickets are booked per passenger and can be canceled before departure. 4. Payment can be made via digital methods, and the system maintains a log of transactions. 5. The system handles seat allocation dynamically based on availability. 6. Admin users can update train information, schedule changes, and manage system data. --- ### Main Entities and Attributes: 1. User (Passenger) * User\_ID (Primary Key) * Name * Email * Phone * Address * ID\_Proof (e.g., Aadhaar or Passport) * Date\_Of\_Birth 2. Train * Train\_ID (Primary Key) * Train\_Name * Source\_Station * Destination\_Station * Total\_Coaches * Train\_Type (e.g., Express, Superfast) 3. Station * Station\_ID (Primary Key) * Station\_Name * Location 4. Schedule * Schedule\_ID (Primary Key) * Train\_ID (Foreign Key) * Departure\_Station\_ID (Foreign Key from ________ ________ ______ ____ ______ _______ _________.
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