UML中数据类型的语义 [英] the semantic of Data Type in UML

问题描述

数据类型是缺少身份的一组值的描述符

data Type is a descriptor of a set of values that lack identity

这里缺乏身份意味着什么?

What does mean by Lack of identity here?

推荐答案

引用

数据类型类似于类；但是，数据类型的实例仅通过其值来标识.如果两个数据类型具有相同的值，则实例被视为相同.

A data type is similar to a class; however, instances of data type are identified only by their value. If two data types have the same value, the instances are considered identical.

因此，这意味着您无法使用其标识符分隔此DataType的这些对象，因为它们没有任何对象.仅当前值用于比较实例.例如，像Java中的int -instances.

So this means, that you can't seperate these objects of this DataType by their identifier, because they don't have any. Only the current value is used to compare instances. Like int-instances in Java for example.

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