For example, it is possible to express that InvoiceType (type of Invoice number) cannot be subtyped, that is, no one can define a new version of InvoiceType.
比如,有可能表示InvoiceType (Invoice编号的类型)不允许子类型化,任何人都不能定义新版本的InvoiceType。
For example, it is possible to express that InvoiceType (type of Invoice number) cannot be subtyped, that is, no one can define a new version of InvoiceType.
比如,有可能表示InvoiceType (Invoice编号的类型)不允许子类型化,任何人都不能定义新版本的InvoiceType。
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