Contexte et atouts du poste
Ontology-Based Data Access (OBDA) is a paradigm that has shown strong potential for integrating heterogeneous data and enabling knowledge-driven querying of data.
Nevertheless, to tackle real applications, current OBDA systems today need to be extended by supporting more expressive query languages and by developing explanation facilities for query answers.
Mission confiée
The recruited postdoctoral researcher will contribute to the study of foundational and algorithmic questions related to the extension of OBDA.
In particular, such extensions will be motivated by a case study in digital agriculture.
The extension of OBDA towards more expressive queries will consider features among aggregation, navigation, and negation.
In this context, a theoretical analysis of semantics, as well as decidability and complexity for query extensions, shall be studied.
The candidate will also contribute to the development of novel frameworks for qualitative and quantitative explanations of query results, with special attention to the interaction between expressivity and explanation, especially when dealing with large sets of explanations to enumerate.
Principales activités
Expected outcomes include publications of the results on the aforementioned topics in leading conferences of knowledge representation and reasoning and databases.
Compétences
The candidate should have strong skills in theoretical computer science, in particular in topics like decidability and complexity.
Experience with the application of these techniques to issues related with knowledge represenation and reasoning and databases would be appreciated.
The candidate should dispose of a good level of english, good communicating skills, and be able to integrate and work effectively with different researchers from the team.
Avantages
Rémunération
Gross Salary: 2788 € per month.