The Unified Modeling Language  

Chu defines Unified Modeling Language (UML) as a standardized system of diagrams, notations, and semantics for object-oriented design and modeling. He offers a basic introduction to UML, provides a conceptual model, and describes UML's building blocks and common mechanisms. The article includes a brief history of UML.

Chu, Steve W. Intercom (2000). Design>User Interface>XML>UML