Biography

I’m Sebastián, an Assistant Professor at the Data & Artificial Intelligence Initiative of Universidad de Chile, where I research Knowledge Graphs — focusing on their extraction, management, and use for querying, browsing, and AI applications. I am also a Young Researcher at the Institute for Foundational Research on Data (IMFD) and a Collaborating Researcher at the National Center for Artificial Intelligence Research (CENIA).

Previously, I was a postdoctoral researcher at the Department of Computer Science at Universidad de Chile and, earlier, at the Department of Computer and Information Science at Linköping University, Sweden. I obtained my PhD from Universidad de Chile in 2021 with a thesis on similarity-based web queries, where I proposed a self-similarity join algorithm and new similarity join and clustering operators for SPARQL. During my master’s studies, I created IMGpedia, a large-scale multimedia knowledge graph that won first place in the 25th Latin American Master Thesis Competition (CLEI 2017).

I serve on the Editorial Board of the Open Access Journal Transactions on Graph Data and Knowledge, and currently lead a Fondecyt project on graph data management. My work has been recognized with multiple awards, including Best Paper at CoopIS 2023 and both Best Student Paper (Resources Track) and Best Poster at ISWC 2017.

Interests
  • Multimedia Databases
  • Graph Databases and Knowledge Graphs
  • (Federated) Data Management
Education
  • PhD in Computer Science, 2021

    Universidad de Chile

  • MSc in Computer Science, 2017

    Universidad de Chile

  • BEng in Computer Science, 2017

    Universidad de Chile

Recent Publications

(2025). COTTAS: Columnar Triple Table Storage for Efficient and Compressed RDF Management. In ISWC 2025.

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(2025). Graph Querying or Similarity Search? Both!. In ISWC 2025.

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(2024). Extracting Graphs from Tables via Conceptual Models. In International Semantic Web Conference (Poster and Demo Track).

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(2024). Application of Graph Neural Networks for Representing and Analyzing Internet Topology via the BGP Protocol. In ACM Internet Measurement Conference (Poster Track).

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(2024). ERDoc: A Web Interface for Entity-Relation Modelling. In (DataEd'24).

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(2024). TelarKG: a Knowledge Graph of Chile’s Constitutional Process. In (GRADES-NDA'24).

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(2024). Similarity joins and clustering for SPARQL. Semantic Web Journal.

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(2024). The Property Graph Data Format (PGDF). IEEE Access.

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(2024). MillenniumDB: A Multi-modal, Multi-model Graph Database. In SIGMOD 2024 (Demo Track).

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(2023). Considering Vocabulary Mappings in Query Plans for Federations of RDF Data Sources. In (CoopIS'23).

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Recent & Upcoming Talks

TelarKG: a Knowledge Graph of Chile's Constitutional Process
An Algebra for Evaluating Path Queries
Mirando el Mundo Real a través de los Grafos
Una Introducción a los Grafos de Conocimiento

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