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Whenever a document is published, the continuous queries satisfying this document are found and notifications are sent to appropriate clients. This article deals with the filtering problem that needs to be solved efficiently by each server: Given a database of continuous queries\n            <jats:italic>db<\/jats:italic>\n            and a document\n            <jats:italic>d<\/jats:italic>\n            , find all queries\n            <jats:italic>q<\/jats:italic>\n            \u2208\n            <jats:italic>db<\/jats:italic>\n            that match\n            <jats:italic>d<\/jats:italic>\n            . We present data structures and indexing algorithms that enable us to solve the filtering problem efficiently for large databases of queries expressed in the model\n            <jats:italic>AWP<\/jats:italic>\n            .\n            <jats:italic>AWP<\/jats:italic>\n            is based on named attributes with values of type text, and its query language includes Boolean and word proximity operators.\n          <\/jats:p>","DOI":"10.1145\/1462198.1462202","type":"journal-article","created":{"date-parts":[[2009,3,3]],"date-time":"2009-03-03T16:00:45Z","timestamp":1236096045000},"page":"1-47","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":20,"title":["Information filtering and query indexing for an information retrieval model"],"prefix":"10.1145","volume":"27","author":[{"given":"Christos","family":"Tryfonopoulos","sequence":"first","affiliation":[{"name":"Max-Planck Institute for Informatics, Saarbr\u00fccken, Germany"}]},{"given":"Manolis","family":"Koubarakis","sequence":"additional","affiliation":[{"name":"National and Kapodistrian University of Athens, Athens, Greece"}]},{"given":"Yannis","family":"Drougas","sequence":"additional","affiliation":[{"name":"University of California Riverside, Riverside, CA"}]}],"member":"320","published-online":{"date-parts":[[2009,3,9]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/1099554.1099565"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/301308.301326"},{"key":"e_1_2_1_3_1","unstructured":"Aho A. Hopcroft J. and Ullman J. 1983. Data Structures and Algorithms. Addison- Wesley Reading MA.   Aho A. Hopcroft J. and Ullman J. 1983. Data Structures and Algorithms. Addison- Wesley Reading MA."},{"key":"e_1_2_1_4_1","unstructured":"Aho A. V. Sethi R. and Ullman J. 1986. Compilers Principles Techniques and Tools. Addison-Wesley Reading MA.   Aho A. V. Sethi R. and Ullman J. 1986. Compilers Principles Techniques and Tools. Addison-Wesley Reading MA."},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1145\/304182.304571"},{"volume-title":"Proceedings of the 26th VLDB Conference.","author":"Altinel M.","key":"e_1_2_1_6_1","unstructured":"Altinel , M. and Franklin , M . 2000. Efficient filtering of XML documents for selective dissemination of information . In Proceedings of the 26th VLDB Conference. Altinel, M. and Franklin, M. 2000. Efficient filtering of XML documents for selective dissemination of information. 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