Nested region algebra extended with variables for tag-annotated text search.

@inproceedings{masuda-2008-nested, author = {Katsuya Masuda and Jun'ichi Tsujii}, editor = {James G. Shanahan and Sihem Amer-Yahia and Ioana Manolescu and Yi Zhang and David A. Evans and Alek Kolcz and Key-Sun Choi and Abdur Chowdhury}, title = {{Nested region algebra extended with variables for tag-annotated text search}}, booktitle = {{Proceedings of the 17th ACM Conference on Information and Knowledge Management, CIKM 2008, Napa Valley, California, USA, October 26-30, 2008}}, pages = {1349--1350}, publisher = {ACM}, year = {2008}, url = {https://doi.org/10.1145/1458082.1458273}, doi = {https://doi.org/10.1145/1458082.1458273} }