{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,12,29]],"date-time":"2022-12-29T05:21:45Z","timestamp":1672291305610},"reference-count":4,"publisher":"Association for Computing Machinery (ACM)","issue":"13","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Proc. VLDB Endow."],"published-print":{"date-parts":[[2014,8]]},"abstract":"<jats:p>Numerous web databases, e.g., amazon.com, eBay.com, are \"hidden\" behind (i.e., accessible only through) their restrictive search and browsing interfaces. This demonstration showcases HDBTracker, a web-based system that reveals and tracks (the changes of) user-specified aggregate queries over such hidden web databases, especially those that are frequently updated, by issuing a small number of search queries through the public web interfaces of these databases. The ability to track and monitor aggregates has applications over a wide variety of domains - e.g., government agencies can track COUNT of openings at online job hunting websites to understand key economic indicators, while businesses can track the AVG price of a product over a basket of e-commerce websites to understand the competitive landscape and\/or material costs. A key technique used in HDBTracker is RS-ESTIMATOR, the first algorithm that can efficiently monitor changes to aggregate query answers over a hidden web database.<\/jats:p>","DOI":"10.14778\/2733004.2733032","type":"journal-article","created":{"date-parts":[[2015,5,12]],"date-time":"2015-05-12T15:37:52Z","timestamp":1431445072000},"page":"1569-1572","source":"Crossref","is-referenced-by-count":2,"title":["HDBTracker"],"prefix":"10.14778","volume":"7","author":[{"given":"Weimo","family":"Liu","sequence":"first","affiliation":[{"name":"The George Washington University"}]},{"given":"Saad Bin","family":"Suhaim","sequence":"additional","affiliation":[{"name":"The George Washington University"}]},{"given":"Saravanan","family":"Thirumuruganathan","sequence":"additional","affiliation":[{"name":"University of Texas at Arlington"}]},{"given":"Nan","family":"Zhang","sequence":"additional","affiliation":[{"name":"The George Washington University"}]},{"given":"Gautam","family":"Das","sequence":"additional","affiliation":[{"name":"University of Texas at Arlington"}]},{"given":"Ali","family":"Jaoua","sequence":"additional","affiliation":[{"name":"Qatar University"}]}],"member":"320","published-online":{"date-parts":[[2014,8]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/1807167.1807259"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.14778\/2732977.2732985"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/1559845.1560001"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.14778\/2350229.2350232"}],"container-title":["Proceedings of the VLDB Endowment"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.14778\/2733004.2733032","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,12,28]],"date-time":"2022-12-28T09:36:58Z","timestamp":1672220218000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.14778\/2733004.2733032"}},"subtitle":["monitoring the aggregates on dynamic hidden web databases"],"short-title":[],"issued":{"date-parts":[[2014,8]]},"references-count":4,"journal-issue":{"issue":"13","published-print":{"date-parts":[[2014,8]]}},"alternative-id":["10.14778\/2733004.2733032"],"URL":"https:\/\/doi.org\/10.14778\/2733004.2733032","relation":{},"ISSN":["2150-8097"],"issn-type":[{"value":"2150-8097","type":"print"}],"subject":[],"published":{"date-parts":[[2014,8]]}}}