 Describe interaction among design objects  Simplify sequence diagrams using subsystems  Describe persistence-related behavior  Refine the flow of events description  Unify classes and subsystems

 Identify classes and subsystems  Update the organization of the Design Model  Describe Distribution  Runtime Architecture

 Key Concepts  Define the High-Level Organization of Subsystems  Identify Analysis mechanisms  Identify Key Abstractions  Create Use-Case Realizations

 Key Concepts  Analysis and Design Workflow

 Introduction  Key Concepts  Use-Case Model  Glossary  Supplementary Specifications

Huffman codes用于数据压缩一般可以达到 Huffman code 缩20%到90%的效果

 Statechart diagrams  Deployment diagrams  Component diagrams

 Class diagrams  Class relationships ▪ Association ▪ Aggregation ▪ Generalization

 Classes  Interaction diagrams  Sequence diagrams  Collaboration diagrams  Interaction diagram comparison  Reports

 What is modeling?  Four principles of visual modeling  The UML  Process and visual modeling