If a supplied domain is not suitable for a particular message format, you can write your own programmatic or descriptive parser for use by your own user-defined domain.
如果没有某个已提供的域适合于特定的消息格式，您可以编写自己的编程或描述解析器，以供您自己的用户定义的域使用。
The iniRealm object, which is a component used by the SecurityManager to represent user accounts defined in the INI format.
iniRealm对象，它被SecurityManager用来表示以INI格式定义的用户帐户。
User-defined functions (or procedures) can accept row types as arguments. Here is an example of formatting the each row returned in XML format.
用户定义函数(或流程)可以接受row类型参数。
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