Modeling a System's Logical Structure: Introducing Classes and Class Diagrams
为系统逻辑结构建模: 类与类图

class: 类
object: 对象
instance: 实例
state: 状态
behavior: 行为
attribute: 属性
inline attribute: 内置属性
attribute properties: 属性特性
operation: 操作
abstraction: 抽象化
encapsulation: 封装
visibility: 可见性 (public, protected, package, private)
accessible: 访问性
specialized class: 特定类
base class: 基础类
association: 关联
multiplicity: 多重性
signature: 签名
singleton design pattern: 单实例设计模式

visibility:
+ public
# protected
~ package
- private

Learn:
Learning UML 2.0, O'Reilly
by Russ Miles & Kim Hamilton