The XML data should be structured to make that pattern matching as easy as possible.
应该构造XML数据，使模式匹配尽可能简单。
Using the concept of domain and the principle of template matching, the domain-relationship expression and its extension are developed to realize the semantic mapping from structured data to XML data.
利用域的概念和模板匹配的原理，引入域关系表达式及其扩展表达式来实现结构化数据到XML数据的语义映射。
The main task of a question-answer system is to locate the most matching answer from the underlying structured document collection.
主要任务就是从底层的结构化文档集合中找到用户需要的最合适的答案。
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