In this case, there was little alternative to what they called the "cryptic" format that the out-of-the-box notification provided, and a hook code-based rule was used. 在这个例子中,对于那些“即时可用”的通知所提供的被称之为“秘密的”格式没有其他选择,基于hook的规则被使用。
Either of these simple changes to a hook code-based rule would require versioning the schema and upgrading the user database. 每一种对于基于hook的规则的简单变更都将需要描述图表和更新用户数据库。