Antonio Moscoso
Universidade de Santiago de Compostela (USC)
2026–present
Biography
I am David Chaves-Fraga, assistant professor at Universidade de Santiago de Compostela (USC, Spain) and a senior researcher at the Center for Research in Intelligent Technologies (CiTIUS@USC). I am a former researcher at the Ontology Engineering Group (OEG) at Technical University of Madrid (UPM) where I hold my PhD with my thesis "Knowledge Graph Construction from Heterogeneous Data Sources Exploiting Declarative Mapping Rules" in 2021. I was also research collaborator at the Declarative Languages and Artificial Intelligence Group (DTAI) at KU Leuven, Belgium (2022-2025). My main research lines are focused on the optimization and evaluation of data integration systems, mainly the construction of Knowledge Graphs from (semi)structured sources using declarative mapping rules.As I really believe that research is a collaborative task, I'm continuously trying to contribute to my research community. For that reason, I'm currently co-chairing the W3C community group for Knowledge Graph Construction, I organize a homonymous workshop series (KGCW) and gave several tutorials in semantic web conferences about this topic. Additionally, I have been the main coordinator of Open Summer of Code in Spain from 2018 to 2021, a formative, international, and innovative program for undergrad and master students.
Education
-
Ph.D in Artificial Intelligence (2016-2021)
Universidad Politécnica de Madrid, Spain -
Master in Artificial Intelligence (2015-2016)
Universidad Politécnica de Madrid, Spain -
Bachelor in Computer Science (2011-2015)
Universidade de Santiago de Compostela, Spain
Experience
-
Assistant Professor (2023-now)
Universidade de Santiago de Compostela, Spain -
Senior Researcher (2025-now)
CiTIUS, Spain -
Research Collaborator (2023-2025)
CiTIUS, Spain -
Research Collaborator (2022-2025)
DTAI (KU Leuven), Belgium -
Postdoctoral researcher (2021-2023)
Ontology Engineering Group (UPM), Spain -
Main Coordinator (2018-2021)
Open Summer of Code, Spain -
Predoctoral researcher (2016-2021)
Ontology Engineering Group (UPM), Spain -
Visiting researcher (4 months - 2019)
Scientific Data Management (TIB), Germany -
Visiting researcher (3 months - 2017)
Center of Semantic Web Research (UDC), Chile
Publications
Constraint-Guided RDF Construction with Provenance
Xuemin Duan, David Chaves-Fraga, Anastasia Dimou.
International Semantic Web Conference, 2026
Paper (soon)
Code
Exploring Cutting-Edge Data Ecosystems: A Comprehensive Analysis
Ioannis Chrysakis, David Chaves-Fraga, Giorgos Flouris, Erik Mannens and Anastasia Dimou.
Data & Knowledge Engineering, 2026
Paper
Editorial of Special Issue on Knowledge Graph Construction
David Chaves-Fraga, Christophe Debruyne, Anastasia Dimou and Maria-Esther Vidal.
Semantic Web Journal, 2026
Paper
From Genesis to Maturity: Managing Knowledge Graph Ecosystems Through Life Cycles
Sandra Geisler,
Cinzia Cappiello, Irene Celino, David Chaves-Fraga, Anastasia Dimou, Ana Iglesias-Molina, Maurizio Lenzerini, Anisa Rula, Dylan Van Assche, Sascha Welten, and Maria-Esther Vidal.
International Conference on Very Large Data Bases (VLDB), 2025
Paper
Are Knowledge Graphs Ready for the Real World? Challenges and Perspective
David Chaves-Fraga, Oscar Corcho, Anastasia Dimou and Maria-Esther Vidal.
Report from Dagstuhl Seminar, 2024
Report
When Ontologies met Knowledge Graphs: Tale of a Methodology
Romana Pernisch, María Poveda-Villalón, Diego Conde-Herreros, David Chaves-Fraga, and Lise Stork.
Extended Semantic Web Conference (P&D), 2024
Paper
The RML Ontology: A Community-Driven Modular Redesign After a Decade of Experience in Mapping Heterogeneous Data to RDF
Ana Iglesias-Molina, Dylan Van Assche, Julián Arenas-Guerrero, Ben De Meester, Christophe Debruyne, Samaneh Jozashoori, Pano Maria, Franck Michel, David Chaves-Fraga, and Anastasia Dimou.
International Semantic Web Conference, 2023
Nominated for the Best Paper Award in the Resources Track
Paper RML PortalDeclarative RDF construction from in-memory data structures with RML
Ioannis Dasoulas, David Chaves-Fraga, Daniel Garijo, and Anastasia Dimou.
4th Edition of the Knowledge Graph Construction Workshop co-located with ESWC, 2023
Paper
Morph-KGC-RAM
Evo-KnoMo: How to Evolve with the Current Times (fiction paper)
Oscar Corcho, Ana Iglesias-Molina, Edna Ruckhaus, Jhon Toledo, ChatOEG, and David Chaves-Fraga.
Extended Semantic Web Conference, 2023 (or 2043)
Paper
Systematic Construction of Knowledge Graphs for Research-Performing Organizations.
David Chaves-Fraga, Oscar Corcho, Francisco Yedro, Roberto Moreno, Juan Olías and Alejandro De La Azuela
Information, 2022
Paper
Declarative Description of Knowledge Graphs Construction Automation: Status & Challenges.
David Chaves-Fraga, Anastasia Dimou.
3rd Edition of the Knowledge Graph Construction Workshop co-located with ESWC, 2022
Paper
Guía práctica para la publicación de datos enlazados
David Chaves-Fraga, Edna Ruckhaus, and Oscar Corcho.
datos.gob.es, 2022
Document (Spanish)
Resources
RML-star: A Declarative Mapping Language for RDF-star Generation
Thomas Delva, Julián Arenas-Guerrero, Ana Iglesias-Molina, Oscar Corcho, David Chaves-Fraga, and Anastasia Dimou
International Semantic Web Conference Demos, 2021
Paper
Specification
Knowledge Graph Construction with R2RML and RML: An ETL System-based Overview
Julián Arenas-Guerrero, Mario Scrocca, Ana Iglesias-Molina, Jhon Toledo, Luis Pozo-Gilo,Daniel Dona,
Oscar Corcho, David Chaves-Fraga.
2nd Edition of the Knowledge Graph Construction Workshop co-located with ESWC, 2021
Paper
Resources
Towards a New Generation of Ontology Based Data Access
Oscar Corcho, Freddy Priyatna, David Chaves-Fraga
Semantic Web Journal, 2020
Paper
Exploiting Declarative Mapping Rules for Generating GraphQL Servers with Morph-GraphQL
David Chaves-Fraga, Freddy Priyatna, Ahmad Alobaid, Oscar Corcho
International Journal of Software Engineering and Knowledge Engineering, 2020
Paper
Code (Deprecated)
Morph-GraphQL: GraphQL Servers Generation from R2RML Mappings
Freddy Priyatna, David Chaves-Fraga, Ahmad Alobaid , Óscar Corcho.
International Conference on Software Engineering and Knowledge Engineering, 2019
Paper
Code (Deprecated)
Conformance Test Cases for the RDF Mapping Language (RML)
Pieter Heyvaert, David Chaves-Fraga, Freddy Priyatna, Oscar Corcho, Erik Mannens, Ruben Verborgh, Anastasia Dimou.
Iberoamerican Knowledge Graphs and Semantic Web Conference, 2019
Paper
Test-Cases
Implementation Report
GraphQL Servers Generation from R2RML with Morph-GraphQL
Ahmad Alobaid, David Chaves-Fraga, Freddy Priyatna, Óscar Corcho.
International Conference on Software Engineering and Knowledge Engineering (Demo), 2019
Paper
Optimized Term Extraction Method Based on Computing Merged Partial C-Values
Victoria Kosa, David Chaves-Fraga, Hennadii Dobrovolskyi, Vadim Ermolayev .
International Conference on Information and Communication Technologies in Education, Research, and Industrial Applications, 2019
Paper
Similar Terms Grouping Yields Faster Terminological Saturation.
Victoria Kosa, David Chaves-Fraga, Nataliya Keberle, Aliaksandr Birukou.
International Conference on Information and Communication Technologies in Education, Research, and Industrial Applications, 2019
Paper
Cross-Evaluation of Automated Term Extraction Tools by Measuring Terminological Saturation.
Victoria Kosa, David Chaves-Fraga, Dmitriy Naumenko, Eugene Yuschenko, Carlos Badenes-Olmedo, Vadim Ermolayev, Aliaksandr Birukou.
International Conference on Information and Communication Technologies in Education, Research, and Industrial Applications, 2018
Paper
The Jedi Approach: Using The Force to Solve Linked Data Incompleteness.
Valentina Anita Carriero, David Chaves-Fraga, Arnaud Grall, Lars Heling, Subhi Issa, Thomas Minier, Alberto Moya Loustaunau.
International Semantic Web Summer School, 2018
Paper
Providing Reliable Access to Real-Time and Historic Public Transport Data Using Linked Connections.
Julián Rojas, David Chaves-Fraga, Pieter Colpaert, Ruben Verborgh, Erik Mannens.
International Semantic Web Conference (Posters & Demos), 2017
Paper
Talks
The W3C Knowledge Graph Construction Community Group
David Chaves-Fraga
AC Meeting - W3C, 2026
Slides
Challenges in Data Management for Evolving Knowledge Graphs
David Chaves-Fraga.
Keynote at 9th Managing the Evolution and Preservation of the Data Web Workshop at ISWC 2023
Slides
Web-Scale Semantic Data Integration: Challenges and Perspective
David Chaves-Fraga.
Keynote at 2nd International Workshop on the Semantic Web of Everything co-located with ICWE, 2023
Slides
Human-Friendly RDF Graph Construction: Which one do you chose?
Ana Iglesias-Molina, David Chaves-Fraga, Ioannis Dasoulas and Anastasia Dimou.
23rd International Conference on Web Engineering, 2023
Slides
From Data Spaces to Decentralized Knowledge Spaces: The Public Procurement use case
David Chaves-Fraga.
Panel at "Congreso Internacional de Espacios de Datos Sectoriales y Transparencia en el Sector Público", 2023
Slides
Evo-KnoMo: How to Evolve with the Current Times (fiction paper/presentation)
Oscar Corcho, Ana Iglesias-Molina, Edna Ruckhaus, Jhon Toledo and David Chaves-Fraga.
Extended Semantic Web Conference, 2023
Slides
Knowledge Graphs and Ontologies: A Practical Introduction to the Semantic Web
David Chaves-Fraga.
Universidad de Santiago de Compostela (Invited Talk), 2022
Slides
Declarative Knowledge Graph Construction: A Practical Introduction.
David Chaves-Fraga.
Ontology Engineering and Knowledge Graphs tool ecosystem Workshop (OntoCommons EU-Project), 2022
Slides
Workshop Website
Declarative Description of Knowledge Graphs Construction Automation: Status & Challenges.
David Chaves-Fraga, Anastasia Dimou.
3rd Edition of the Knowledge Graph Construction Workshop co-located with ESWC, 2022
Slides
Why Mapping Rules are Important for Constructing your KG?
David Chaves-Fraga
Invited Talk at Polifonia H2020 project, 2022
Slides
Project Website
Morph-KGCstar: Declarative Generation of RDF-star Datasets from Heterogeneous Data
David Chaves-Fraga David Chaves-Fragam, Julián Arenas-Guerro, Ana Iglesias-Molina, Daniel Garijo, Oscar Corcho, Anastasia Dimou
EAVISE group talk - KULeuven, 2022
Slides
Knowledge Graph Construction: From Optimization To Automation
David Chaves-Fraga
EAVISE group talk - KULeuven, 2022
Slides
Declarative Construction of Knowledge Graphs: one-year status-update
David Chaves-Fraga
OEG Internal Talk - UPM, 2022
Slides
Knowledge Graph Construction Using Declarative Mapping Rules
Ana Iglesias-Molina, David Chaves-Fraga, Andrea Cimmino, Oscar Corcho
International Semantic Web Conference (Tutorial), 2020
Slides
Morph-CSV: Virtual Knowledge Graph Access for Tabular Data
David Chaves-Fraga, Luis Pozo
International Semantic Web Conference (Demo), 2020
Video
Knowledge Graph Construction and Access using Declarative Mappings
David Chaves-Fraga, Freddy Priyatna, Ahmad Alobaid, Andrea Cimmino, Ana Iglesias, Jhon Toledo, Daniel Doña, Luis Pozo, Edna Ruckhaus, Oscar Corcho
National Project Meeting, 2020
Slides
From Engineering to Research - The KG Construction Use Case
David Chaves-Fraga
Internal OEG Meeting, 2020
Slides
Generating and Querying (Virtual) Knowledge Graphs from Heterogeneous Data Sources
David Chaves-Fraga, Freddy Priyatna, Ahmad Alobaid, Andrea Cimmino, Oscar Corcho
International Semantic Web Conference (Tutorial), 2019
Slides
What are the Parameters that Affect the Construction of a Knowledge Graph?
David Chaves-Fraga
Ontologies, DataBases, and Applications of Semantics for Large Scale Information Systems (ODBASE), 2019
Slides
ONETT: Systematic Knowledge Graph Generation for National Access Point
David Chaves-Fraga
Sem4Tra Workshop, 2019
Slides
Virtual Knowledge Graph Generation from Heterogeneous Data Sources
David Chaves-Fraga
TIB Retreat, 2019
Slides
How to Develop Mapping Rules for Knowledge Graph Creation
Ana Iglesias-Molina, David Chaves-Fraga
Internal OEG Meeting, 2019
Slides
Lenguajes de Mapeo para el acceso datos heterogéneos (Spanish)
David Chaves-Fraga
National Project Meeting, 2019
Slides
Virtual Knowledge Graph Generation from Heterogeneous Data Sources
David Chaves-Fraga, Freddy Priyatna
Ghent University, 2018
Slides
GraphQL-Based Access to Virtual Datasets Exposed by RML Mappings
Freddy Priyatna, David Chaves-Fraga
Ghent University, 2018
Slides
The Jedi Approach: Using The Force to Solve Linked Data Incompleteness
Valentina Anita Carriero, David Chaves-Fraga, Arnaud Grall, Lars Heling, Subhi Issa, Thomas Minier, Alberto Moya Loustaunau
International Semantic Web Summer School (ISWS), 2018
Slides
RMLC: RDF Mapping Language for heterogeneous CSV files
David Chaves-Fraga
Internal OEG Meeting, 2018
Slides
Enlazando datos abiertos en el transporte público (Spanish)
David Chaves-Fraga, Oscar Corcho
Jornadas de periodismo de datos y datos abiertos - Medialab-Prado, 2018
Slides
Presentation of Open Summer of Code Spain (Spanish)
David Chaves-Fraga
Open Data Day - Medialab-Prado, 2018
Slides
On the Role of the GRAPH Clause in the Performance of Federated SPARQL Queries
David Chaves-Fraga
Profiles Workshop (ISWC), 2017
Slides
The tripscore Linked Data client: calculating specific summaries over large time series
David Chaves-Fraga
DeSemWeb Workshop (ISWC), 2017
Slides
Semantic Interoperability in the Transport Domain
David Chaves-Fraga
9th IT Combined Meeting in Cologne, 2017
Slides
Tripscore: Datos enlazados para el transporte público (Spanish)
David Chaves-Fraga
Dataton Madrid, 2017
Slides
The relevance of metadata in the transport domain: TransportDCAT-AP
David Chaves-Fraga
Civic Hack Night in Brussels, 2017
Slides
Community
Co-Chair of Knowledge Graph Construction W3C Community Group / 2020 - now
Organizer of Workshop Series on Knowledge Graph Construction / 2019-now
Chair of Workshops & Tutorials at SEMANTiCS / 2025
Organizer of Workshop on Software Lifecycle Management For Knowledge Graphs / 2024
Organizer of the Tutorial on Knowledge Graph Construction / ECAI 2024
Organizer of Workshop Series on Semantics and the Web for Transport / 2019-2023
Organizer of the Tutorial on Knowledge Graph Construction / ESWC 2022
Chair of Posters and Demos at SEMANTiCS / 2022
Organizer of the Tutorial on Knowledge Graph Construction / ISWC 2020
Organizer of the Tutorial on Knowledge Graph Construction / KG4DI 2022
Organizer of the Tutorial on Knowledge Graph Construction / ESWC 2019
Coach of Coaches on Open Summer of Code Spain / 2018-2021
Projects
SCAILED / 2026-2029
EU4Health — SCale-up Biotech AI Innovation by Leveraging Responsible Data Use under the European Health Data Space
CardiongenIA / 2026-2029
Knowledge Graph–based AI for Diagnostic and Prognostic Interpretation of Genetic Tests in Inherited Cardiovascular Diseases
GALA / 2025-2028
AI Agent Powered by Knowledge Graphs and Large Language Models for Clinical Practice Support
REOPEN / 2024-2027
Spanish National Project for Enhancing Process Management with KGs and LLMs
Datos.Gob / 2021
Spanish national guideline for creating RDF from open data portals using declarative mappings
H2020 - SPRINT / 2019-2021
Semantics for Performant and scalable Interoperability of multimodal Transport
Datos 4.0 / 2016-2020
Spanish National project for using semantic web technologies in data management
EIT-SNAP / 2016-2020
Transforming transport data into EU compliance with semantic web technologies
H2020 GoF4R / 2016-2018
Governance of the Interoperability Framework for Rail and Intermodal Mobility
CEF-OASIS / 2016-2018
Open Applications for Semantically Interoperable Services
Student Supervision
Doctoral Students
Alberto Landi
Universidade de Santiago de Compostela (USC)
2026–present
Isaac Noya
Universidade de Santiago de Compostela (USC)
2026–present
Andrés García
Universidade de Santiago de Compostela (USC)
2026–present
Diego Conde
Universidad Politécnica de Madrid (UPM)
2023–2026
Bachelor’s & Master’s Theses
2025–2026 2 theses
Javier Garea Cidre
MSc ThesisMaster in Artificial Intelligence
Automatic Generation of Declarative Mapping Rules for Knowledge Graph Construction
Alberto Landi Cortiñas
MSc ThesisMaster in Artificial Intelligence
A Comparative Analysis of LLM and Knowledge Graph Integration Strategies in the Medical Domain
2024–2025 4 theses
Adrián Martínez Balea
BSc ThesisBSc in Computer Science
Automatic Constraint Extraction for Knowledge Graphs Using LLMs
Isaac Noya Vázquez
BSc ThesisBSc in Computer Science
A Benchmark for Learning Ontologies from Relational Databases
Estela Bernárdez Platas
BSc ThesisBSc in Computer Science
Entity Linking in the Medical Domain
Saray Alvite Sánchez
MSc ThesisMaster in Digital Cultural Heritage
MPC: A Galician Geoportal for Citizens