Although you could model all your data without attributes, they can be a very intuitive choice for data items which are known in advance to never repeat (per element) nor have any sub-fields.
虽然不用属性也可以对所有数据进行建模,但是对于预先知道不会重复(对于每个元素而言),也没有任何子字段的数据项,使用属性仍是最直观的选择。
The process is simple: you take a known image - called the memory peg - and combine with the element you want to memorize.
过程很简单:你选择一个已知的图像——称为记忆挂钩——和你想记住的要素结合起来。
In previous versions of BIRT, the number of columns in a table element had to be known at design-time, whereas with the cross TAB element, the number of columns and rows can be dynamic.
在BIRT以前的版本中,表格元素中列的数量在设计时就要确定好,而在跨标签元素的帮助下,列和行的数量都可以动态生成。
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