联合数据类型必须从原子数据类型或列表数据类型派生。
A union data type must be derived from an atomic or list data type.
联合数据类型必须从原子数据类型或列表数据类型派生。
A list data type must be derived from an atomic or union data type.
另一个派生的示例是使用不带抽象类型的扩展。
Another example for derivation is when you use an extension without an abstract type.
首先，派生的方面可以选择注释类型。
派生的简单类型约束了基类型的值。
A derived simple type constrains the values of its base type.
其中并没有com . example .RequestMessage和com .example .ResponseMessage这两个派生类型的定义。
The definition for the two derived types, com.example.RequestMessage and com.example.ResponseMessage, are not present.
现在，看看如何访问基本数据类型和派生数据类型的参数。
Now, take a look at how to access basic and derived data types of arguments.
这些外表类型都派生自外表基类型cairo_surface_t。
Each of these surfaces derives from a base surface type, cairo_surface_t.
基类的派生类，类型的仿制药。网。
确定此派生元素所基于的类型定义。
Determines the type definition that this derived element is based upon.
分部类必须派生自支持根元素的类型。
The partial class must derive from the type that backs the root element.
然后，可针对特定的安全句柄类型对这些类进一步派生。
These classes can then be further derived for specific safe handle types.
如果某虚函数为私有函数，则派生类型无法访问它。
If a virtual function is private, it cannot be accessed by a derived type.
如果某虚函数为私有函数，则派生类型无法访问它。
If a virtual function is private, it cannot be accessed by a derived type.
应用推荐