In the address record example, both the simple and complex structures were expressed using only elements; you can refine and enhance the structure-with sort keys, for instance-using attributes.
在这个地址记录示例中，简单结构和复杂结构都只使用元素来表达；可以使用属性来改进和增强这个结构—例如，通过排序键。
It is a powerful ETL solution which collects, integrates and transforms large volumes of data with simple and complex data structures.
它是一个强大的ETL解决方案，能够收集、集成和转换大量数据，能够处理复杂的数据结构。
XML can represent data as simple structures or as complex and elaborate structures.
XML 可以将数据表示为简单的结构，或者表示为复杂而详细的结构。
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