xml重复元素的最佳实践 [英] best practice for xml repeating elements

问题描述

如本例所示重复 xml 元素是否可以接受?请注意，在第一个示例中，'period_data' 元素是如何直接在 'usage_history' 元素中重复的，而没有首先被包裹在类似于 'periods' 父元素的东西中.

Is it acceptable to repeat xml elements as shown in this example? Notice in the first example how the 'period_data' element is just repeated directly inside the 'usage_history' element without first being wrapped inside something like a 'periods' parent element.

最初对我来说，包含 'periods' 父元素似乎是多余的，因为 'usage_history' 父元素中唯一的东西是 'period_data' 元素.

Initially it seems reduant to me to include the 'periods' parent element as the only thing inside the 'usage_history' parent are 'period_data' elements anyway.

谢谢.

<usage_history num_periods="2">
    <period_data billing_year="2013" billing_period="2">
        content...
    </period_data>
    <period_data billing_year="2013" billing_period="1">
        content...
    </period_data>
</usage_history>

与此相反...

<usage_history>
    <periods num_periods="2">
        <period_data billing_year="2013" billing_period="2">
            content...
        </period_data>
        <period_data billing_year="2013" billing_period="1">
            content...
        </period_data>
    </periods>
</usage_history>

推荐答案

是的.那样就好.不需要额外的封闭元素.

Yes. That is fine. There is no need for an extra enclosing element.

我还要说 num_periods="2" 是错误的，因为 period_data 元素应该说明它们自己.

I would also say that num_periods="2" is wrong, as the period_data elements should account for themselves.

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