东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (2): 18-27.DOI: 10.12068/j.issn.1005-3026.2025.20230298

• 信息与控制 • 上一篇    下一篇

面向双时态RDF星型查询的两阶段索引方法

王刚, 张薇, 陈宏栉, 张富()   

  1. 东北大学 计算机科学与工程学院,辽宁 沈阳 110169
  • 收稿日期:2023-10-27 出版日期:2025-02-15 发布日期:2025-05-20
  • 通讯作者: 张富
  • 作者简介:王 刚(1978—),男,辽宁本溪人,东北大学讲师
    张 富(1983—),男,内蒙古呼和浩特人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(62276057)

Two-Stage Indexing Method for Bitemporal RDF Star Query

Gang WANG, Wei ZHANG, Hong-zhi CHEN, Fu ZHANG()   

  1. School of Computer Science & Engineering,Northeastern University,Shenyang 110169,China.
  • Received:2023-10-27 Online:2025-02-15 Published:2025-05-20
  • Contact: Fu ZHANG

摘要:

为了对时间信息进行表示和处理,随之开展了时态RDF(temporal resource description framework)的扩展研究,而如何对时态RDF数据进行有效的管理也逐渐成为了一个重要问题.构建有效的索引机制是管理时态RDF数据和提高查询效率的重要途径之一.本文提出了一种针对双时态RDF(bitemporal RDF)星型查询的两阶段索引方法:第一阶段索引提出一种基于双时态RDF节点邻域信息的候选集生成方法,第二阶段索引进一步提出一种基于位图索引的结果集生成方法.通过两阶段索引可以避免星型查询中成本昂贵的连接操作,快速得到查询结果.在查询效率和索引性能方面进行了对比实验,验证了所提方法的有效性.

关键词: 资源描述框架(RDF), 双时态RDF, 星型查询, 两阶段索引, 位图索引

Abstract:

In order to represent and process time information, the extended research on temporal RDF (temporal resource description framework) model has been carried out, and how to effectively manage temporal RDF data has gradually become an important issue. Constructing a reasonable and effective index mechanism is one of the important ways to manage temporal RDF data and improve query efficiency. A two-stage indexing method for bitemporal RDF star query was proposed. First-stage indexing proposes a candidate set generation method based on bitemporal RDF node neighborhood information, and second-stage indexing further proposes a result set generation method based on bitmap indexing. With two-stage indexing, expensive join operations in star queries can be avoided and query results can be obtained quickly. This paper conducts comparative experiments in terms of query efficiency and index performance to verify the effectiveness of the proposed method.

Key words: resource description framework(RDF), bitemporal RDF, star query, two-stage indexing, bitmap indexing

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