Shaping Knowledge and Interoperable Graphs

Prelegent(ci)

Jose Emilio Labra Gayo

Afiliacja

University of Oviedo, Spain

Język referatu

angielski

Termin

21 kwietnia 2026 10:15

Pokój

p. 4060

Seminarium

Seminarium "DeSeR: Dane, strumienie, rozpraszanie"

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Short bio: Jose Emilio Labra Gayo. Full Professor at University of Oviedo, Spain. Founder and main researcher of WESO (Web Semantics Oviedo) research group, which collaborates with different companies around the world applying semantic web technologies. He is a member of the W3C Data Shapes working group and of the W3C community groups: Shape Expressions and SHACL. He implemented the SHACL and ShEx library SHaclEX in Scala, maintains the online RDF validator services RDFShape and WikiShape, and is now implementing the rudof library in Rust which can also be used to validate RDF with ShEx, SHACL, DCTAP, etc.

Overview: Since Google introduced the use of Knowledge Graphs to enhance search functionality and organize information internally, their adoption and application have grown significantly. Various technologies have been developed to implement Knowledge Graphs, like RDF, Property Graphs and Wikibase. The recent introduction of RDF 1.2 aims to bridge the gap between RDF and Property Graphs by enabling statements about statements, offering greater flexibility. Data quality is a critical aspect of Knowledge Graphs, often ensured through validation against predefined data models or shapes. This tutorial will explore several approaches developed for describing and validating RDF, such as ShEx and Shapes Constraint Language (SHACL). Notably, the Data Shapes Working Group has been tasked this year with developing SHACL 1.2, aligning it with RDF 1.2. We will briefly outline these approaches, highlighting their similarities, differences, and recent advancements. In the case of Property Graphs, PGSchema was proposed, as well as other proposals like PShEx or ProGS, and more recently GQL offers a way to define typed graphs. Wikidata adopted Entity Schemas, which are based on ShEx as well as its own property constraint system, and there is a proposal called WShEx. This tutorial will explore different types of Knowledge Graphs and approaches for their validation. 

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