Ontology can be viewed as a tree structure. Concepts comprise of class and subclass, the relationships between which are tree's edges.
一个本体可以抽象为一个树状结构，概念由类与子类构成，类与子类之间的关系是树中的边。
This is one approach that enables the client to determine what member of the class hierarchy it receives, and process the additional information in the subclass accordingly.
这是一种可以使客户端能确定他接收到的是类层次中的什么成员的方法，并相应处理子类中的附加信息。
Also any data change on a subclass involves two tables: the super class table and the subclass table.
任何子类数据的修改都涉及两张表：超类的表和子类的表。
The pros include compact tables (no unnecessary nullable columns), data partitions across three subclass tables and easy association with other tables using the top super class table.
优点包括数据表比较紧凑(没有不需要的可空字段)，数据跨三个子类的表进行分区，容易使用超类的表与其他表进行关联。
You must subclass (that is, create a class that extends it) and create an instance of the child class.
必须创建子类(即，创建继承它的类)，并创建该子类的实例。
The first two characters of the SQL state are a class value, and the last three characters form a subclass value.
SQL状态的前两个字符是一个类值，后三个字符形成子类值。
If none of the prepackaged Style classes fit your needs, you can subclass the base Style class and define your own naming conventions.
如果没有预包装的style类符合您的需要，那么您可以定义Style基类的子类，并定义自己的命名约定。
Instead of creating a new window and setting it up, you put the Gtk.Window class into a subclass and move all setup code into a constructor.
现在不再创建并设置新窗口，而是把Gtk . window类放进一个子类，并把所有设置代码移动到构造函数。
To change the behavior of the Factory class, you simply subclass FactoryImpl and override its non-static methods.
要更改Factory类的行为，只要子类化Factory Impl并覆盖其非静态方法。
A Struts action is an instance of an action class subclass that implements a portion of a Web application and returns a forward.
Struts操作是Action类子类的实例，用来实现一部分Web应用程序并返回一个转发。
The Authenticator class is abstract, so you'll need to subclass it and implement the getPasswordAuthentication() method to store the username and password (see Listing 13).
Authenticator是一个抽象类，所以需要从它派生出子类，并实现 getPasswordAuthentication()方法来存储用户名和密码（见清单 13）。
Every class you define is a subclass of owl: thing and a superclass of owl: Nothing.
您所定义的每个类都是owl：thing的子类，并且是owl：Nothing的超类。
With Zeus, you subclass the implementation class and use your subclass instead of the generated class when unmarshalling a document.
用Zeus可以生成实现类的子类，当对文档进行数据分解时，使用子类而不是使用生成类。
The tree class represents a tree and is a subclass of Basetree.
树以tree类表示，这个类是Basetree的子类。
I can subclass the RequiredModelMBean class, guaranteed to be present in any JMX implementation, and add the functionality I need.
可以继承Requiredmodelmbean类，保证它出现在所有JMX实现中，并增加我所需要的功能。
Table per-class: (Optional) Each concrete subclass is mapped to a table and contains columns for super class attributes.
按类表：(可选)每个具体的子类映射到一个表，并且包含超类属性的列。
A trivial subclass fills the need of having a class with a unique name and leaves all the actual handling to be common.
子类使用惟一的类名，并且使实际的处理具有通用性。
To do this, JFace either provides an object that you use or a class you can subclass — and sometimes it provides both.
为了做到这一点，JFace提供可使用的对象，或提供可将其子类化的类（有时它两者都提供）。
Within this hierarchy, DirectTypeSetter sets a configuration type directly, and the TypeStringify class and its MethodTypeStringify subclass are responsible for converting types to strings.
在这个层次中，DirectTypeSetter直接设置一个配置类型，typestringify类和它的MethodTypeStringify子类则负责将类型转换为字符串。
The register method call takes a class as an argument and makes the ABC a subclass of the registered class.
register方法调用接受一个类作为其参数并会让此abc成为所注册类的子类。
The device descriptor read by the host controller driver contains information about the device, such as class, subclass, and protocol.
主机控制器设备驱动程序读取的设备描述符包含关于设备的信息，例如class、subclass和protocol。
In the Extender properties panel, enter "name" in the name field, select Item in the class field, and select Text in the Item subclass field as shown below.
在extender属性面板中，在name字段输入“name”，在class字段选择item，在Itemsubclass字段选择Text，如下所示。
Each subject grouping in USPTO's scheme includes a major component called a class and a minor one called a subclass.
每一个集成于usptos体制中的主题包含了被称为集的一个主要的成分和被称为副集一个稍小的成分。
In cases where base classes and subclass each register class handling, the subclass handlers are invoked first.
在基底类别和子类别个别注册类别处理的情况下，子类别处理常式会先叫用。
A class that passes properties and methods to another class is called a superclass. A class can be both a subclass and a superclass.
一个超越其他类别的类别被称为超级类别，一个类别可以既是最高类别又是超级类别。
A class that passes properties and methods to another class is called a superclass. A class can be both a subclass and a superclass.
一个超越其他类别的类别被称为超级类别，一个类别可以既是最高类别又是超级类别。
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