54 citations · 127 across the 12 of their papers we have counts for
8 papers · 1 filter
A Copernican Revolution in Data
Claudio Gutierrez
Half a century ago, Charles Bachman foresaw the significance and centrality of data in the digital world. In this short paper, we delve into the evolution of these ideas within the…
Querying in the Age of Graph Databases and Knowledge Graphs
Marcelo Arenas, Claudio Gutierrez, Juan F. Sequeda
Graphs have become the best way we know of representing knowledge. The computing community has investigated and developed the support for managing graphs by means of digital techno…
An introduction to Graph Data Management
Renzo Angles, Claudio Gutierrez
A graph database is a database where the data structures for the schema and/or instances are modeled as a (labeled)(directed) graph or generalizations of it, and where querying is…
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…
The multiset semantics of SPARQL patterns
Renzo Angles, Claudio Gutierrez
The paper determines the algebraic and logic structure of the multiset semantics of the core patterns of SPARQL. We prove that the fragment formed by AND, UNION, OPTIONAL, FILTER,…
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…