19 June 2024

Olaf Hartig at the division Database and Information Techniques (ADIT) has won the Best Poster Award at the ESWC 2024 conference, which is one of the two top conferences on knowledge graphs and semantic web technologies.

Image of the diploma

The poster paper entitled "Datatypes for Lists and Maps in RDF Literals" was honored with the best poster award at the 21st Extended Semantic Web Conference (ESWC) in June 2024. It is authored by Olaf Hartig, Gregory Todd Williams, Michael Schmidt, Ora Lassila, Carlos Manuel Lopez Enriquez, and Bryan Thompson and presents work that Olaf Hartig, division ADIT at the Department of Computer and Information Science, has done in his role as an Amazon Scholar with the Neptune graph database team at Amazon Web Services.

Poster description by Olaf Hartig

A knowledge graph is a form of graph-structured database intended to capture knowledge about entities and their relationships. Motivated by their suitability for powering artificial intelligence (AI) applications, for connecting data about customers or products, and for data integration, knowledge graphs have become an important topic for many of today's data-driven enterprises, including Swedish companies such as Scania, Ericsson, and IKEA.

The prevalent approach to represent and to query knowledge graphs is via the graph data model of the Resource Description Framework (RDF) and its query language called SPARQL.

The awarded poster paper introduces an approach to extend the SPARQL with built-in support for generic types of composite values (lists and maps in particular). The lack of features to capture and to query such composite values has been a considerable limitation for graph database users and knowledge graph applications. The proposed approach facilitates a broad range of use cases, including the integration of lists of all kinds into knowledge graphs (for example public transport timetables, series of measurement values), the direct annotation of entities in a knowledge graph with embedding vectors for machine learning and neuro-symbolic AI applications, as well as a more streamlined integration of knowledge graph technology into the broader data ecosystem within organisations. The ultimate goal is to bring the proposed approach to standardisation by the World Wide Web Consortium (W3C) as extensions of the RDF and SPARQL standards. To this end, the poster paper is accompanied by a complete formal specification of the proposed approach, a comprehensive test suite for implementers, and two open source implementations.

Read more:

Contact

Award winners at IDA

Organisation

Latest news from LiU

A piece of crystal sitting on top of black cloth.

Qubits created using unexpected materials

For the first time, researchers have demonstrated that the properties of the perovskite family of materials can be used to create so-called quantum bits. The findings pave the way for more affordable materials in future quantum computers.

En man som sitter vid ett bord framför ett fönster.

Three more years as Vice-Chancellor

The Government has announced that Jan-Ingvar Jönsson has been reappointed as Vice-Chancellor of Linköping University for a further three years, until 30 June 2029.

A close up photo in black and white of a man.

David Livingstone Smith will be guest professor at LiU

David Livingstone Smith is a professor of philosophy, he focuses on dehumanisation, race and genocide. He regards the guest professorship in the name of Tage Danielsson as a great honour and a respite from a strained academic climate in the US.