下面的清单介绍了一些最重要的结构，使用ioctl套接字命令时常常用到这些结构。

The listings below show some of the most important structures that are frequently used while working with ioctl socket commands.

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对于新的关键字通过编写命令处理器来扩充语法的能力。

Ability to extend syntax by writing command handlers for newly contributed keywords.

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您可以利用该命令来使用关键字，而不是将ID放入目录页面的URL中。

You can leverage this to use keywords instead of IDs in the URL of the category page.

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