最初样条配置法是利用三次样条函数并在自然节点上进行配置，但精度不够高。
Original spline collocation methods collocate at the nodes by cubic spline functions, but the precision isn't good.
例如，在Perl中，把xml节点的属性自然地表示成一个散列，因为它们是一组唯一的名称-值对。
For example, the attributes of an XML node would naturally be represented in Perl as a hash, since they are a set of unique name-value pairs.
对于这些节点，希望显示文本而不是提供输入数据的机会，所以 xforms:output 控件是自然的选择。
You're interested in simply displaying text rather than providing any opportunity for data input for these nodes, so the xforms:output control is a natural choice.
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