一个事务是一个特定的测试元素组，您可能对其所含的测试元素的性能感兴趣。
A transaction is a specific group of test elements whose performance you are interested in.
transaction(事务)是您会感兴趣的，一组特殊的测试元素中的执行元素。
A transaction is the performance element that you are interested in within a specific group of test elements.
比如，要运行两组测试，简单创建两个test元素。
For example, to run two sets of tests, I simply create two test elements.
在内部for - each - group中，它将使用XPathcurrent - group [self：h2]测试组是否包含h 2元素。
Inside the inner for-each-group, it tests to see whether the group contains an h2 element using the XPath current-group [self: : h2].
简单性：程序可以使用这些节点测试，选择基于共同组head元素或类型定义的一组元素，而不是逐一列举所有具体的元素名。
Simplicity: the program can use these node tests to select a group of elements based on their common group head element or type definition rather than enumerate all concrete element names one by one.
两个函数都要求提供的模式文档声明或定义要测试的实例元素，以及代替组head元素或引用类型。
Both functions require that the provided schema documents declare or define the instance element to be tested and the substitution group head element or the referenced type.
设计了一组数据结构来记录构成测试程序的所有图形化编程元素的显示属性和运行属性值。
It also designs some of the data structures to record the displaying and running attributes of the programming elements that composed the ATP.
设计了一组数据结构来记录构成测试程序的所有图形化编程元素的显示属性和运行属性值。
It also designs some of the data structures to record the displaying and running attributes of the programming elements that composed the ATP.
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