基于开放环境下关联数据的偏好查询系统设计  

Design of Preference Query System Based on Linked Data in Open Environment

作　　者：赵羽晗 胡磊[1] ZHAO Yu-han;HU Lei(School of Computer Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学计算机科学与技术学院,江苏南京211100

出　　处：《计算机技术与发展》2020年第9期7-11,共5页Computer Technology and Development

基　　金：国家自然科学基金(61370075);南京航空航天大学研究生创新基地(实验室)开放基金项目(kfjj20181601)。

摘　　要：Web是当前全球最大的信息资源库,为大量的Web用户提供所需的多样性信息是Web数据管理极具挑战性的任务。目前以资源描述框架(RDF)为代表的关联数据成为Web上数据表示与处理的新形式,SPARQL是一种RDF数据的查询语言,由于SPARQL可查询的数据的数量、多样性及其集成的不断增加,激发了通过优选查询结果的一种规范来查询RDF数据的愿望。为了满足用户需求,文中通过查询重写将偏好纳入到SPARQL中,对中间结果集使用经典的Top-k排序算法,设计并实现支持用户偏好需求的RDF数据查询系统,依托选用的数据集对系统进行实用性的验证。对该系统进行可用性测试后表明,所设计的查询系统不但具有可行性,且查询的形式符合人类表达规律,所扩展的SPARQL语法具有较强的偏好表达能力,通过排序优选后的结果符合用户偏好的程度较高。Web is currently the world’s largest information repository.Providing a large number of Web users with the required diversity of information is a challenging task of Web data management.At present,associated data represented by resource description framework(RDF)has become a new form of data representation and processing on the Web.SPARQL is a query language for RDF data.Due to the increasing number,diversity and integration of data that SPARQL can query,it stimulates the desire to query RDF data by a specification of preferred query results.In order to meet user needs,we incorporate preferences into SPARQL through query rewriting,use the classic Top-k sorting algorithm for intermediate result sets,design and implement RDF data query system that supports user preference requirements,and validate the system based on selected data sets.The experimental results and analysis show that the query system designed is feasible and the expression of the query is in accordance with the natural language of human beings.The extended SPARQL syntax has strong preference expression ability,and the precision of the query is higher by sorting.

关 键 词：RDF SPARQL 数据管理 偏好 个性化查询 

分 类 号：TP311.1[自动化与计算机技术—计算机软件与理论]