可以通过从现有类型派生新的类型来满足这类需求。
You can meet some of these needs can be met by deriving types from existing ones, but not others.
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.
DITA包括三种从基本主题类型派生的信息类型：任务、概念和参考。
DITA includes three information types derived from the base topic type: task, concept, and reference.
使用极大或极小的数字或者模仿从数值类型派生的私有数据类型。
Using very large or very small Numbers or emulating private data-types derived from numeric types.
此faultInfo的类型派生自错误的wrapper元素引用的模式，在本例中为 Fault。
The type of this faultInfo is derived from the schema, which the fault's wrapper element refers to; in this case it's Fault.
通常情况下，建议您使用泛型集合，因为这样可以获得类型安全的直接优点而不需要从基集合类型派生并实现类型特定的成员。
Using generic collections is generally recommended, because you gain the immediate benefit of type safety without having to derive from a base collection type and implement type-specific members.
当s CA运行时派生组件类型时，只有在那个合成文件中提升的服务和引用将被使用。
Only the services and references promoted in that composite file would then be used when the SCA runtime derives the component type.
派生数据类型是已有的基本类型或其他派生类型的一个派生物或结构。
A derived data type is a derivative or structure of existing base types or other derived types.
首先，派生的方面可以选择注释类型。
映射现在支持转换为派生类型。
缺少这两个派生类型是一个互操作性问题，因为抽象类型是不能出现在XML实例文档中的。
The lack of the two derived types is an interoperability problem because abstract types cannot appear in an XML instance document.
改变子类型中派生组件的实现的能力演示了XML模式中多态性的一种形式。
The ability to vary implementation of derived components in subtypes demonstrates one flavor of polymorphism in XML schemas.
XML模式允许通过扩展或限制来派生类型。
XML schemas allow types to be derived by extension and by restriction.
数据类型可以是简单、复杂、派生或者数组类型。
在XML模式中，可以使用抽象类或仅使用指定基类型扩展或派生的标记来做到这一点。
In XML schemas you can use abstract classes or just tags specifying extensions or derivations of base types.
接口继承就是这样的；如果你要满足派生程度较高的类型的契约的话，你就必须要满足派生程度较低的类型。
That's what interface inheritance means; if you fulfill the contract of the more derived type then you are required to also fulfill the contract of the less derived type.
派生类型必须是它们的基础类型完全可替换的。
Derived types must be completely substitutable for their base types.
现在，如果在运行时作为基类型传递派生的子类，那么无法通过检查接口参数类型识别出子类。
When you now try to pass a derived subclass in terms of a base type at run time, the subclasses will not be recognized by simply introspecting the interface parameter types.
通过限制实现的派生在希望创建基类型的子集的情况下有用。
Derivation by restriction is useful in cases where you want to create a subset of the base type.
您从类型ISBN派生该组件并限制其IS BN最大为五位。
You derive this component from the type ISBN and restrict an ISBN to a maximum of five digits.
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.
抽象类不能在实例文档中使用；它们只是为其派生类型提供占位符。
Classes cannot be used in instance documents; they simply provide a placeholder for their derived types.
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.
类型特征模板派生自一个true -type或false - type。
Type traits templates are derived from either a true-type or false-type.
表5给出了Linux上与Solaris上不同的一些派生数据类型。
Table 5 shows some of the derived data types on Linux that are different from those on Solaris.
要查看逻辑派生类型，在导航树中展开ServiceMetadata。
To see logical derivation types, expand Service Metadata in the navigation tree.
通常，Web服务将要求有效负载数据仅使用XMLSchema内建类型，而不使用从这些类型中派生的任意类型。
Often Web services will require that the payload data only use the XML Schema built-in types and not any types derived from these.
在一个系统中有两种不同类型的数据类型：基本数据类型（basicdata type）和派生数据类型（derived datatypes）。
There are two different classes of data types available on a system: base data types and derived data types.
升级Library数据库之后，要创建对应着4种派生形式的文档类型。
After updating the Library database, we create document types that correspond to each of the four subforms.
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