For example, the values of derived simple type ProductCode is a subset of the values of base type string.

比如，派生简单类型ProductCode的值是基类型string值的子集。

youdao

For example, the values of derived simple type ProductCode is a subset of the values of base type string.

比如，派生简单类型ProductCode的值是基类型string值的子集。

youdao