157 citations · 185 across the 3 of their papers we have counts for
5 papers · 1 filter
MillenniumDB: A Persistent, Open-Source, Graph Database
Domagoj Vrgoc, Carlos Rojas, Renzo Angles +7
In this systems paper, we present MillenniumDB: a novel graph database engine that is modular, persistent, and open source. MillenniumDB is based on a graph data model, which we ca…
Directly Mapping RDF Databases to Property Graph Databases
Renzo Angles, Harsh Thakkar, Dominik Tomaszuk
RDF triplestores and property graph databases are two approaches for data management which are based on modeling, storing, and querying graph-like data. In spite of such common pri…
G-CORE: A Core for Future Graph Query Languages
Renzo Angles, Marcelo Arenas, Pablo Barceló +9
We report on a community effort between industry and academia to shape the future of graph query languages. We argue that existing graph database management systems should consider…
Correlation and Substitution in SPARQL
Daniel Hernández, Claudio Gutierrez, Renzo Angles
In the current SPARQL specification the notion of correlation and substitution are not well defined. This problem triggers several ambiguities in the semantics. In fact, implementa…
Negation in SPARQL
Renzo Angles, Claudio Gutierrez
This paper presents a thorough study of negation in SPARQL. The types of negation supported in SPARQL are identified and their main features discussed. Then, we study the expressiv…