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The three contributions range from a technique based on the notion of exactly unified summaries for the creation of symbolic objects, a model-based approach for interval data as an innovative parametric strategy in this context, and measures of similarity defined between a class and a collection of classes based on the frequency of the categories which characterize them.<\/jats:p>\n                  <jats:p>The paper shows the effectiveness of the proposed approaches as prototypes of numerous techniques developed within the SDA framework and opens to possible further developments.<\/jats:p>","DOI":"10.3233\/sji-240013","type":"journal-article","created":{"date-parts":[[2024,8,20]],"date-time":"2024-08-20T11:01:53Z","timestamp":1724151713000},"page":"563-579","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["New skills in symbolic data analysis for official statistics"],"prefix":"10.1177","volume":"40","author":[{"given":"Rosanna","family":"Verde","sequence":"first","affiliation":[{"name":"DMF \u2013 University of the Campania, Italy"}]},{"given":"Vladimir","family":"Batagelj","sequence":"additional","affiliation":[{"name":"IMFM, Ljubljana, Slovenia"},{"name":"University of Primorska, Koper, Slovenia"}]},{"given":"Paula","family":"Brito","sequence":"additional","affiliation":[{"name":"Faculty of Economia, Universidade do Porto & LIAAD-INESC TEC, Porto, Portugal"}]},{"given":"A. 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