@InProceedings{geck_et_al:LIPIcs.ICDT.2022.8, author = {Geck, Gaetano and Keppeler, Jens and Schwentick, Thomas and Spinrath, Christopher}, title = {{Rewriting with Acyclic Queries: Mind Your Head}}, booktitle = {25th International Conference on Database Theory (ICDT 2022)}, pages = {8:1--8:20}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-223-5}, ISSN = {1868-8969}, year = {2022}, volume = {220}, editor = {Olteanu, Dan and Vortmeier, Nils}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2022.8}, URN = {urn:nbn:de:0030-drops-158829}, doi = {10.4230/LIPIcs.ICDT.2022.8}, annote = {Keywords: rewriting, acyclic rewriting, acyclic conjunctive queries, free-connex queries, hierarchical queries, NP-hardness} }
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