For example, one schema could define a key element as base64 data for storing a cryptographic key while another schema would define key as an integer for storing a database identifier.
例如，一个模式可能定义一个key元素为用于密钥的base64数据，而另一个模式将key定义为一个用于储存数据库标识符的整数。
A result set is an array consisting of 0 or more rows that match a database query; a result set identifier is simply a value that you pass to other functions to work with the rows in the result set.
结果集是一个数组，该数组由0个或多个与数据库查询相匹配的行组成；结果集标识符只是一个值，您可以将该值传递给其它函数，以使它们能够使用结果集中的行。
This identifier, most often a database key, can be generated and sent to the client as one of the URL parameters.
这个标识符(通常是数据库键)能够作为该url参数之一而生成并发送到客户机。
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