On the Primitivity of SPARQL 1.1 Operators

被引：0
|
作者：
Zhang, Xiaowang [1 ,2 ,3 ]
机构：
[1] Tianjin Univ, Sch Comp Sci & Technol, Tianjin 300350, Peoples R China
[2] Tianjin Key Lab Cognit Comp & Applicat, Tianjin 300350, Peoples R China
[3] Minist Educ, Key Lab Comp Network & Informat Integrat, Nanjing, Peoples R China
来源：
WWW'17 COMPANION: PROCEEDINGS OF THE 26TH INTERNATIONAL CONFERENCE ON WORLD WIDE WEB | 2017年
基金：
中国国家自然科学基金;
关键词：
RDF databases; SPARQL; 1.1; primitive operator; expressive power;
D O I：
10.1145/3041021.3054260
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The paper studies the primitivity of the eleven basic operators used in the SPARQL 1.1 query language. This paper shows that the six operators BIND, FILTER, GRAPH, property path, SELECT, and VALUES are primitive while the left five operators AND, EXISTS, MINUS, OPT, and UNION, are not primitive. It is surprised that OPT and UNION which are primitive in SPARQL 1.0 become no longer primitive in SPARQL 1.1.
引用
收藏
页码：875 / 876
页数：2
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