{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T17:47:19Z","timestamp":1754156839228,"version":"3.41.2"},"reference-count":25,"publisher":"Emerald","issue":"2","license":[{"start":{"date-parts":[[1990,2,1]],"date-time":"1990-02-01T00:00:00Z","timestamp":633830400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1990,2,1]]},"abstract":"<jats:p>This paper discusses a knowledge based information retrieval model with hierarchical thesaurus. The model computes the conceptual distance between a query and an object and both are indexed with weighted terms from a hierarchical thesaurus. The hierarchical thesaurus is represented by a hierarchical\u2010concept graph (HCG) in which nodes represent concepts and directed edges represent generalisation relationships. Rada <jats:italic>et al<\/jats:italic>. have developed a similar model. However, their model considered only a binary indexing scheme and revealed some counter\u2010intuitive results. Our proposed model extends theirs by allowing the index term and the edge of the HCG to be weighted. A new concept mapping method is devised to overcome Rada's counter\u2010intuitive results. In addition, a scheme for allowing Boolean operators in user queries is provided with a formula for computing conceptual distance from negated index terms. Experimental results have shown that our model simulates human performance more closely than Rada's model.<\/jats:p>","DOI":"10.1108\/eb026857","type":"journal-article","created":{"date-parts":[[2008,1,19]],"date-time":"2008-01-19T07:38:53Z","timestamp":1200728333000},"page":"113-136","source":"Crossref","is-referenced-by-count":39,"title":["A MODEL OF KNOWLEDGE BASED INFORMATION RETRIEVAL WITH HIERARCHICAL CONCEPT GRAPH"],"prefix":"10.1108","volume":"46","author":[{"given":"YOUNG","family":"WHAN KIM","sequence":"first","affiliation":[]},{"given":"JIN H.","family":"KIM","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"doi-asserted-by":"publisher","key":"p_1","DOI":"10.1002\/(SICI)1097-4571(198709)38:5<375::AID-ASI5>3.0.CO;2-3"},{"volume-title":"Introduction to modern information retrieval","year":"1983","author":"SALTON G.","key":"p_2"},{"key":"p_3","volume":"15","author":"EVENS M.","year":"1985","journal-title":"Journal of the American Society for Information Science, 5(5(1)"},{"key":"p_4","volume":"181","author":"CARN D.B.","year":"1980","journal-title":"Journal of the American Societyfor Information Science, 5\/(3)"},{"issue":"3","key":"p_5","first-page":"221","volume":"75","author":"BACKUS J.","year":"1987","journal-title":"Bulletin of the Medical Library Association"},{"doi-asserted-by":"publisher","key":"p_6","DOI":"10.1145\/358315.358322"},{"doi-asserted-by":"publisher","key":"p_7","DOI":"10.1016\/0020-0271(71)90042-8"},{"doi-asserted-by":"publisher","key":"p_8","DOI":"10.1016\/0306-4573(76)90049-2"},{"key":"p_9","first-page":"631","volume-title":"North-Holland","author":"SHOVAL P.","year":"1983"},{"key":"p_10","first-page":"455","volume-title":"Proceedings of the 2nd Conference on AI Applications. 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