Book borrowing and returning system_data flow diagram

This is a data flow diagram for a book borrowing and returning system, designed to illustrate the processes within a library's operations. The diagram includes key components such as the library database, borrowing and returning procedures, and the issuance of documents like borrowing slips and return receipts. It details steps like checking if a borrower has exceeded their limit, handling overdue fines, and processing maintenance management. Additionally, it outlines interactions between library staff and readers, emphasizing the importance of valid library cards and accurate reader profiles. This diagram serves as a comprehensive guide to understanding the library's lending system.