●●●●● ●●●● 属性:集合的表示法 ●●● ●●● ●●●● Sale Saleslineltem time: date Time lineltems: SalesLineltem [1.." lineltems SalesLineltem [1."]ordered Two ways to show a collection attribute Sale Saleslineltem time: Date Time lineltems ordered, List] notice that an association end can optionally also I have a property string such as ordered, List]
属性：集合的表示法 notice that an association end can optionally also have a property string such as {ordered, List} Sale time: DateTime ... SalesLineItem ... ... 1..* lineItems {ordered, List} Sale time: DateTime lineItems : SalesLineItem [1..*] or lineItems : SalesLineItem [1..*] {ordered} ... SalesLineItem ... ... Two ways to show a collection attribute
●●●●● ●●●● 属性:可见性 ●●● ●●● ●●●● ●公共 ●私有 ●保护 ●包(Java)
属性：可见性 ⚫ 公共 ⚫ 私有 ⚫ 保护 ⚫ 包（Java）