【摘要】 数据变换和数据集成等应用需要对XML文档进行更新,而现有的查询语言对此支持不够。提出了一种可更新的XML查询语言UXQL。它具有统一的数据模型,能够同时对多个异构数据源中的文档进行更新和查询操作。同时它的结构简单,可以很方便地实现和优化。详细描述了UXQL的文法和语言成分,并给出了实现框架和应用实例。更多还原

【Abstract】 Applications like data transformation and data integration will need to update the XML documents.but the existing query languages don’t support that.This paper presents an updateable query language named UXQL,which has unified data model.It can query and update the documents of many heterogeneous data sources,whose structure is simple to realize and optimize .The paper presents UXQL’s grammar and language components along with realization and an example of application.更多还原