The XML is determined,which need to be scanned by matching Schema and query path.
通过Schema与查询路径匹配,确定需要扫描的XML文档。
参考来源 - 基于Schema的XML索引方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The optimizer uses system catalogs indicating how many rows there are and how well the indexes are formed to figure out what query path to use.
优化程序采用系统目录，说明那里有多少行，以及构造了较好的索引来计算所采用的查询路径。
JEST applies a special interpretation to the path and query segments to translate them to an appropriate persistence operation.
JEST会对路径和查询部分进行特殊解析，将它们转换成一个正确的持久化操作。
The real distinction between path components and query parameters is that between hierarchical versus unordered arguments.
路径成分与查询参数之间真正的差异是，前者是层次化的，而后者是无次序的。
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