XML文档中通过keyword搜索面临的新问题：



1.搜索时：

HTML只能返回整体文件

XML能返回文件中深度嵌套的元素



2.排序时：

HTML的粒度（最小单位）是整体文件

XML的粒度是嵌套在文件中的元素



3.XML中判断一个返回元素对于keyword的接近程

度将更加复杂多元化

-XML document search by keyword is facing new problems: 1. Search: HTML documents can only return to the overall XML document can return deeply nested element 2. Sort: HTML particle size (smallest unit) is the whole XML-document granularity is nested in the document to determine the elements 3.XML a return element in the proximity of the keyword will be more complex and diversified