Class 图重数混淆
Class diagram multiplicity confusion
我正在尝试绘制 class 图，但我不确定我所做的是否正确。
场景
这所大学有一个规定，一门课最多只能由两个讲师讲授。每个讲师只教0到两门课。
是的，这是正确的；作为助记术，你可以把它读成一个句子
"Lecturer teaches [0..2] Course(s)"
和
"Course is taught by [1..2] Lecturer(s)"
The multiplicity attached to the target end denotes the possible cardinalities of the set of target instances selected by the pairing of
a qualified instance and a qualifier value.
(http://www.omg.org/spec/UML/2.5/Beta1/PDF/ 章节 11.5 关联)
我正在尝试绘制 class 图，但我不确定我所做的是否正确。
场景 这所大学有一个规定，一门课最多只能由两个讲师讲授。每个讲师只教0到两门课。
是的，这是正确的；作为助记术，你可以把它读成一个句子
"Lecturer teaches [0..2] Course(s)"
和
"Course is taught by [1..2] Lecturer(s)"
The multiplicity attached to the target end denotes the possible cardinalities of the set of target instances selected by the pairing of a qualified instance and a qualifier value.
(http://www.omg.org/spec/UML/2.5/Beta1/PDF/ 章节 11.5 关联)