{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,29]],"date-time":"2025-12-29T18:47:10Z","timestamp":1767034030597,"version":"build-2065373602"},"reference-count":18,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2007,3,22]],"date-time":"2007-03-22T00:00:00Z","timestamp":1174521600000},"content-version":"vor","delay-in-days":9456,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Am. Soc. Inf. Sci."],"published-print":{"date-parts":[[1981,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The frequency characteristics of terms in the documents of a collection have been used as indicators of term importance for content analysis and indexing purposes. In particular, very rare or very frequent terms are normally believed to be less effective than medium\u2010frequency terms. Recently automatic indexing theories have been devised that use not only the term frequency characteristics but also the relevance properties of the terms. The major term\u2010weighting theories are first briefly reviewed. The term precision and term utility weights that are based on the occurrence characteristics of the terms in the relevant, as opposed to the nonrelevant, documents of a collection are then introduced. Methods are suggested for estimating the relevance properties of the terms based on their overall occurrence characteristics in the collection. Finally, experimental evaluation results are shown comparing the weighting systems using the term relevance properties with the more conventional frequency\u2010based methodologies.<\/jats:p>","DOI":"10.1002\/asi.4630320304","type":"journal-article","created":{"date-parts":[[2007,6,28]],"date-time":"2007-06-28T09:47:55Z","timestamp":1183024075000},"page":"175-186","source":"Crossref","is-referenced-by-count":25,"title":["The measurement of term importance in automatic indexing"],"prefix":"10.1002","volume":"32","author":[{"given":"G.","family":"Salton","sequence":"first","affiliation":[]},{"given":"H.","family":"Wu","sequence":"additional","affiliation":[]},{"given":"C. T.","family":"Yu","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2007,3,22]]},"reference":[{"volume-title":"Automatic Information Organization and Retrieval","year":"1968","author":"Salton G.","key":"e_1_2_1_2_2"},{"volume-title":"Information Retrieval","year":"1979","author":"Van Rijsbergen C. J.","key":"e_1_2_1_3_2"},{"key":"e_1_2_1_4_2","unstructured":"Bookstein A.\u201cFuzzy Requests: An Approach to Weighted Boolean Searches.\u201d Paper presented at Joint Meeting of the Operations Research Society of America and the Institute of Management Science New Orleans May1979."},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/asi.4630290309"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/asi.4630280605"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1147\/rd.14.0309"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1108\/eb026526"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1108\/eb026562"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/asi.4630260106"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/asi.4630270302"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1145\/321921.321930"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1108\/eb026637"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1145\/322017.322022"},{"key":"e_1_2_1_15_2","doi-asserted-by":"publisher","DOI":"10.1145\/322047.322053"},{"key":"e_1_2_1_16_2","unstructured":"Salton G;Wu H.\u201cA Term Weighting Model Based on Utility Theory.\u201d Paper presented at Symposium on Research and Development in Information Retrieval Cambridge England June1980."},{"volume-title":"Optimum Term Weighting in Information Retrieval Using the Term Precision Model","year":"1980","author":"Yu C. T","key":"e_1_2_1_17_2"},{"volume-title":"The Smart System\u2014Experiments in Automatic Document Processing","year":"1971","author":"Rocchio J. J.","key":"e_1_2_1_18_2"},{"volume-title":"The Smart Retrieval System\u2010Experiments in Automatic Document Processing","year":"1971","author":"Salton G.","key":"e_1_2_1_19_2"}],"container-title":["Journal of the American Society for Information Science"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fasi.4630320304","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/asistdl.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/asi.4630320304","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T18:06:49Z","timestamp":1759946809000},"score":1,"resource":{"primary":{"URL":"https:\/\/asistdl.onlinelibrary.wiley.com\/doi\/10.1002\/asi.4630320304"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1981,5]]},"references-count":18,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1981,5]]}},"alternative-id":["10.1002\/asi.4630320304"],"URL":"https:\/\/doi.org\/10.1002\/asi.4630320304","archive":["Portico"],"relation":{},"ISSN":["0002-8231","1097-4571"],"issn-type":[{"type":"print","value":"0002-8231"},{"type":"electronic","value":"1097-4571"}],"subject":[],"published":{"date-parts":[[1981,5]]}}}