The research of Question Answering is to resolve these problems. It accepts the questions in natural language that denoting user requirements and returns the exact answers after analysing the document information. 问题回答的研究解决了这些存在的问题,首先,用户可将信息检索的需求表达为自然语言描述的问题,其次,问题回答将在文档集合中搜索并返回问题的精确答案。
Finally, in the light of user requirements, a whole or a part of XML document tree was converted to an XML document. 在此树上可根据实际需求选择整个(部分)XML文档树转换为XML文档。