Subqueries in SPARQL

Alberto Mendelzon International Workshop on Foundations of Data Management 2011.

社会科学（总论）;计算机科学

Renzo Angles ; Claudio Gutierrez

Others  :  http://ceur-ws.org/Vol-749/paper19.pdf
PID  :  41714

来源: CEUR

【 摘 要 】

The Subqueries functionality is a powerful feature which allows to enforce reuse, composition, rewriting and optimization in a query language. In this paper we perform a comprehensive study of the incorporation of subqueries into SPARQL. We consider several possible choices as suggested by the experience of similar languages, as well as features that developers are incorporating and/or experimenting with. Based on this study, we present an extension of SPARQL, with syntax and formal semantics, which incorporates all known types of subqueries in a modular fashion and preserves the original semantics.