XN-Store:一种原生XML数据库的存储方案

随着XML相关标准的推广与应用,Web上出现了大量的XML文档,为了进行有效的管理,有必要将XML文档存储到数据库中,存储方案已成为XML数据管理领域研究的一个重要课题,将XML文档映射为关系表,存储到传统的RDBMS中,会破坏XML数据的树形结构,造成查询效率的下降,提出了一种新的用于原生XML数据库的存储方案--XN-Store,该方案基于索引结构将XML节点作为记录直接存储到分页文件中,建立起持久化文档对象模型,从而保持了XML数据原有的树形结构.XN-Store不仅降低了XML文档的存储空间开销,而且实现了XML节点的快速串行化输出和访问操作.作为通用的原生XML存储方案,XN-Store支持各种二级索引的创建,以提高XML查询处理的效率,采用多种数据集,分别在XN-Store和先前的XML存储系统上进行实验,比较存储空间、存储时间、串行化时间和节点访问时间.实验结果表明,XN-Store是一种高性能的原生XML数据库存储方案.

XN-Store:A Storage Scheme for Native XML Databases

With the growing popularity and application of XML related standards,large repositories of XML documents have emerged on the Web.It is necessary to store these documents into a database to make them manageable.Storage schemes have become an important research topic in the XML data management field.Mapping XML documents to relational tables and storing them into a traditional RDBMS will break down the tree structure of XML data and cause a decline in query efficiency.This paper presents a novel storage schem...