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雅虎竞拍
煤炉代买
paypay商城
乐天二手
日本亚马逊
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ZOZOTOWN
This document outlines the requirements and design specifications for a chat application. It aims to develop an easy-to-use instant messaging solution that allows users to communicate seamlessly. The specification covers functional and non-functional requirements, use case diagrams for authentication, chat, contacts, monitoring and maintenance functions, and sequence diagrams depicting key processes like registration, login, messaging and friend management. Data flow diagrams and class diagrams are also included.
