Séminaire SESAME du 8 septembre 2025
10H00, salle 104 du bâtiment 11 dit le château, 2 Place Pierre Viala Campus La Gaillarde, 34000 Montpellier
News du W3C en 10 minutes, par Pierre-Antoine CHAMPIN, W3C / INRIA / Université de Lyon
Leveraging Knowledge Graphs for Earth System Dataset Discovery, par Vincent ARMAND, IRD Montpellier:
Thanks to open science initiatives, thousands of standardised datasets on Earth System compartments are now available on the web. In particular, we have widely used ISO 19115 to encode spatiotemporal aspects of Earth System observations. However, this standard does not specify the multiple dimensions of observations, including the features of interest, the observable properties, and the provenance. As a result, researchers interested in Earth System multi-disciplinary studies may miss meaningful datasets when querying independently domain-specific data portals. We propose a new Dataset Discovery System based on SOSA and DCAT ontologies, as well as the User-Centric Metadata Model (UCMM), to integrate dataset metadata from multiple data portals, each representing an Earth System compartment. The descriptive UCMM metadata model is exploited simultaneously to address semantic and structural heterogeneities and to build a descriptive Knowledge Graph explaining how retrieved datasets are semantically related to the user’s search.