本文提供了定制数据库过程的一步步的细节内容，并且包括一些如何对某些字段控制访问权限的钩子函数。
It provides step-by-step details on the procedure for customizing your database, and includes some hooks on how to control access rights to certain fields.
文档访问由一个或多个Readers字段控制，在创建和修改文档时，这些Readers字段是作为文档的一部分保存的。
Document access is controlled by one or more Readers fields that are saved as part of a document when it is created or modified.
表1显示了Boolean字段，该字段控制哪种类型的节点能够调用访问程序的 visit() 方法。
Table 1 shows the Boolean fields that control which types of nodes are allowed to call the visitor's visit() method.
您应该公开组件的属性而不是公共字段，因为属性的版本可以控制，它们允许数据隐藏，并且访问器方法可以执行附加逻辑。
You should expose properties instead of public fields from your components, because properties can be versioned, they allow data hiding, and the accessor methods can execute additional logic.
必须严格控制对这类字段的访问，并需要高级编程技术来同步对类对象的访问。
Access to such a field must be carefully controlled and requires advanced programming techniques for synchronizing access to the class object.
必须严格控制对这类字段的访问，并需要高级编程技术来同步对类对象的访问。
Access to such a field must be carefully controlled and requires advanced programming techniques for synchronizing access to the class object.
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