@article{finitecliquewidthsetsofexistentialrules, title = {Finite-Cliquewidth Sets of Existential Rules: Toward a General Criterion for Decidable yet Highly Expressive Querying}, author = {Thomas Feller and Tim S. Lyon and Piotr Ostropolski-Nalewaja and Sebastian Rudolph}, year = {2022}, eprint = {2209.02464}, archivePrefix = {arXiv}, url = {https://arxiv.org/abs/2209.02464v1}, }