说明：  统一建模语言（UML）是一种直观化，明确化，构建和文档化软件系统产物的通用可视化建模语言。本书讲述了UML基本概念，维UML的深入理解提供一个起点，全文共分十四个章节。
(Unified Modeling Language (UML) is a visual and a clear, build and document software system products in general visual modeling language. This book describes the basic concepts of UML, UML-depth understanding of peacekeeping provide a starting point, the full text is divided into 14 chapters.)