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POPL 2021
Sun 17 - Fri 22 January 2021 Online
Mon 18 Jan 2021 16:00 - 16:30 at PADL - Applications of Declarative Languages Chair(s): Ekaterina Komendantskaya

This paper explores the challenge of encountering incorrect beliefs in the context of reasoning about actions and changes using action languages with sensing actions. An incorrect belief occurs when some observations conflict with the agent’s own beliefs. A common approach to recover from this situation is to replace the initial beliefs with beliefs that conform to the sequence of actions and the observations. The paper introduces a regression-based and revision-based approach to calculate a correct initial belief. Starting from an inconsistent history consisting of actions and observations, the proposed framework (1) computes the initial belief states that support the actions and observations and (2) uses a belief revision operator to repair the false initial belief state. The framework operates on domains with static causal laws, supports arbitrary sequences of actions, and integrates belief revision methods to select a meaningful initial belief state among possible alternatives.

Conference Day
Mon 18 Jan

Displayed time zone: Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna change

16:00 - 17:30
Applications of Declarative LanguagesPADL at PADL
Chair(s): Ekaterina KomendantskayaHeriot-Watt University, UK
16:00
30m
Research paper
A Logic Programming Approach to Regression Based Repair of Incorrect Initial Belief States
PADL
Fabio TardivoNew Mexico State University, Loc PhamNew Mexico State University, Tran Cao SonNew Mexico State University, Enrico PontelliNew Mexico State University
16:30
30m
Research paper
Data validation meets Answer Set Programming
PADL
Mario AlvianoUniversity of Calabria, Carmine DodaroDepartment of Mathematics and Computer Science, University of Calabria, Arnel ZamaylaUniversity of Calabria, Italy
17:00
30m
Research paper
Lightweight Declarative Server-Side Web Programming
PADL
Michael HanusKiel University