@InProceedings{freydenberger:LIPIcs.ICDT.2017.13, author = {Freydenberger, Dominik D.}, title = {{A Logic for Document Spanners}}, booktitle = {20th International Conference on Database Theory (ICDT 2017)}, pages = {13:1--13:18}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-024-8}, ISSN = {1868-8969}, year = {2017}, volume = {68}, editor = {Benedikt, Michael and Orsi, Giorgio}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2017.13}, URN = {urn:nbn:de:0030-drops-70493}, doi = {10.4230/LIPIcs.ICDT.2017.13}, annote = {Keywords: information extraction, document spanners, word equations, regex, descriptional complexity} }