With the great increasing of data and the change of processing condition which have been processed for several years, the performance of the Hospital Information System(HIS) needs optimizing.
系统经过多年的运行后由于数据的大量增加，运行环境的改变等，需要对系统进行优化处理，以提高系统的性能。
Furthermore, the speed of data processing is increased, and available for subsequent processing and handling on account of the optimizing design of computer interface software module.
通过计算机接口软件模块的优化设计，加快了数据处理的速度，同时便于数据的后续处理与加工。
This paper focuses on the query language of XML data, the technologies of path expression optimizing and the query processing of XML data.
本文主要对XML数据库的查询语言、XML数据路径表达式查询的优化技术和XML数据的查询处理技术进行了重点研究。
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