文章摘要
张书亮,孙玉婷,闾国年.原生GML数据库存储模型研究[J].高技术通讯(中文),2013,23(1):
原生GML数据库存储模型研究
Research on a storage model for native GML databases
  修订日期:2012-02-13
DOI:
中文关键词: 地理标记语言(GML), XML, 原生XML数据库, GML存储, 原生GML数据库
英文关键词: geography markup language (GML), XML, native XML database, GML storage, native GML database
基金项目:国家自然科学基金(41171301)和863计划(2006AA12Z221)资助项目
作者单位
张书亮 南京师范大学虚拟地理环境教育部重点实验室南京 
孙玉婷 南京师范大学虚拟地理环境教育部重点实验室南京 
闾国年 南京师范大学虚拟地理环境教育部重点实验室南京 
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中文摘要:
      针对地理标记语言(GML)数据管理的技术难题和GML对象关系数据库存储冗余度高、空间数据查询效率相对较低的弊端,在分析现有原生GML数据库系统存储特点和方法的基础上,提出了一种面向原生GML数据库的逻辑存储模型——NGDLST模型。基于以元素为单位的细粒度存储组织方式和元素节点区间编码方案,分别定义了组成模型的元素名、属性名、元素值、属性值、元素节点、元素集合和文档集合,设计了模型的数据和索引存储结构。进行了该存储原型系统与三种主流原生XML数据库系统在GML存储与查询方面的对比实验,结果表明该模型是实用和高效的。
英文摘要:
      In view of the technical difficulties in geography markup language (GML) data management, the high storage redundancy and the low efficient spatial data querying of GML object-relational databases, the paper proposes a logical storage model for native GML databases on the basis of the analysis of the existing native GML databases management systems’ storage characteristics and methods. It is called the NGDLST model. The model’s components of element name, attribute name, element value, attribute value, element node, element collection and document collection are defined based on a range encoding scheme and a tiny object storage mode which takes an element as the unit to store GML data, and on the basis of this, the model’s storing structure for data and indexes is given. The results of the experiment on comparing the performance of the model’s prototype system with that of three mainstream native XML database management systems show that the proposed model can perform better in GML storage and query.
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