The OLX application is represented in this class diagram. It highlights important entities such as user, item, advertisement, category, transaction, payment, review, and message all having defined attributes and methods.
The item class has links to the category and advertisement enabling advertisements and classified listings. The transaction and payment classes are the ones that process financial dealings. Each class has certain methods that execute important operations which reflect upon essential activities of online marketplaces including registration, listing items, processing payments as well as managing transactions.
