本文介绍了多重性vs基数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在讨论数据模型和数据库时，术语基数通常用于描述给定集合中允许的元素数。
When talking about data models and databases, the term Cardinality is often used to describe the number of allowed elements in a given set.
UML通常指的是与多重性相同的属性。
UML often refers to the same property as Multiplicity.
这两个术语之间的差异是什么？或者它们是同义词吗？
Is there any differences between these two terms or are they synonymous?
推荐答案
具有较低和较高的基数 。基数是集合中有多少个元素。因此，多重性告诉你集合的最小和最大允许成员。它们不是同义词。
Simply put: a multiplicity is made up of a lower and an upper cardinality. A cardinality is how many elements are in a set. Thus, a multiplicity tells you the minimum and maximum allowed members of the set. They are not synonymous.
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