{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T22:23:53Z","timestamp":1759962233867,"version":"3.41.2"},"reference-count":20,"publisher":"Emerald","issue":"3","license":[{"start":{"date-parts":[[1991,3,1]],"date-time":"1991-03-01T00:00:00Z","timestamp":667785600000},"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":[[1991,3,1]]},"abstract":"<jats:p>A thesaurus may be viewed as a graph, and document retrieval algorithms can exploit this graph when both the documents and the query are represented by thesaurus terms. These retrieval algorithms measure the distance between the query and documents by using the path lengths in the graph. Previous work with such strategies has shown that the hierarchical relations in the thesaurus are useful but the non\u2010hierarchical relations are not. This paper shows that when the query explicitly mentions a particular non\u2010hierarchical relation, the retrieval algorithm benefits from the presence of such relations in the thesaurus. Our algorithms were applied to the <jats:italic>Excerpta Medica<\/jats:italic> bibliographic citation database whose citations are indexed with terms from the EMTREE thesaurus. We also created an enriched EMTREE by systematically adding non\u2010hierarchical relations from a medical knowledge base. Our algorithms used at one time EMTREE and, at another time, the enriched EMTREE in the course of ranking documents from <jats:italic>Excerpta Medica<\/jats:italic> against queries. When, and only when, the query specifically mentioned a particular non\u2010hierarchical relation type, did EMTREE enriched with that relation type lead to a ranking that better corresponded to an expert's ranking.<\/jats:p>","DOI":"10.1108\/eb026879","type":"journal-article","created":{"date-parts":[[2008,1,19]],"date-time":"2008-01-19T07:35:14Z","timestamp":1200728114000},"page":"240-253","source":"Crossref","is-referenced-by-count":13,"title":["DOCUMENT RANKING USING AN ENRICHED THESAURUS"],"prefix":"10.1108","volume":"47","author":[{"given":"ROY","family":"RADA","sequence":"first","affiliation":[]},{"given":"JUDITH","family":"BARLOW","sequence":"additional","affiliation":[]},{"given":"JAN","family":"POTHARST","sequence":"additional","affiliation":[]},{"given":"PIETER","family":"ZANSTRA","sequence":"additional","affiliation":[]},{"given":"DJUJAN","family":"BIJSTRA","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"key":"p_1","doi-asserted-by":"publisher","DOI":"10.1016\/0306-4573(87)90109-9"},{"key":"p_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1097-4571(198711)38:6<389::AID-ASI1>3.0.CO;2-4"},{"key":"p_3","doi-asserted-by":"publisher","DOI":"10.1016\/0306-4573(87)90022-7"},{"key":"p_4","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1097-4571(198709)38:5<375::AID-ASI5>3.0.CO;2-3"},{"key":"p_5","doi-asserted-by":"publisher","DOI":"10.1145\/7902.7907"},{"key":"p_6","doi-asserted-by":"publisher","DOI":"10.1145\/57167.57214"},{"key":"p_7","doi-asserted-by":"publisher","DOI":"10.1002\/asi.4630200106"},{"key":"p_8","doi-asserted-by":"publisher","DOI":"10.1108\/eb026817"},{"volume-title":"Semantic information processing","year":"1968","author":"QUILLIAN M.R.","key":"p_9"},{"volume-title":"The implementation of complex information systems","year":"1979","author":"WESSEL EW E","key":"p_10"},{"key":"p_11","doi-asserted-by":"publisher","DOI":"10.1108\/eb026857"},{"key":"p_12","doi-asserted-by":"publisher","DOI":"10.1016\/0306-4573(87)90017-3"},{"key":"p_13","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1097-4571(198909)40:5<304::AID-ASI2>3.0.CO;2-6"},{"key":"p_14","doi-asserted-by":"publisher","DOI":"10.1109\/21.24528"},{"key":"p_15","doi-asserted-by":"publisher","DOI":"10.1016\/0020-7373(89)90024-2"},{"key":"p_16","doi-asserted-by":"publisher","DOI":"10.1109\/34.3883"},{"key":"p_17","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5371(83)90273-6"},{"key":"p_18","unstructured":"COMMISSION OF THE EUROPEAN ECONOMIC COMMUNITY: ADVANCED INFORMATICS IN MEDICINE. 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