{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T20:23:29Z","timestamp":1780604609944,"version":"3.54.1"},"reference-count":97,"publisher":"MIT Press","issue":"4","license":[{"start":{"date-parts":[[2021,10,12]],"date-time":"2021-10-12T00:00:00Z","timestamp":1633996800000},"content-version":"vor","delay-in-days":284,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010661","name":"Horizon 2020 Framework Programme","doi-asserted-by":"publisher","award":["824612"],"award-info":[{"award-number":["824612"]}],"id":[{"id":"10.13039\/100010661","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000821","name":"Joint Information Systems Committee","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000821","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["direct.mit.edu"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2021,12,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The aim of this literature review is to examine the current state of the art in the area of citation classification. In particular, we investigate the approaches for characterizing citations based on their semantic type. We conduct this literature review as a meta-analysis covering 60 scholarly articles in this domain. Although we included some of the manual pioneering works in this review, more emphasis is placed on the later automated methods, which use Machine Learning and Natural Language Processing (NLP) for analyzing the fine-grained linguistic features in the surrounding text of citations. The sections are organized based on the steps involved in the pipeline for citation classification. Specifically, we explore the existing classification schemes, data sets, preprocessing methods, extraction of contextual and noncontextual features, and the different types of classifiers and evaluation approaches. The review highlights the importance of identifying the citation types for research evaluation, the challenges faced by the researchers in the process, and the existing research gaps in this field.<\/jats:p>","DOI":"10.1162\/qss_a_00159","type":"journal-article","created":{"date-parts":[[2021,10,17]],"date-time":"2021-10-17T17:47:49Z","timestamp":1634492869000},"page":"1170-1215","update-policy":"https:\/\/doi.org\/10.1162\/mitpressjournals.corrections.policy","source":"Crossref","is-referenced-by-count":35,"title":["A meta-analysis of semantic classification of citations"],"prefix":"10.1162","volume":"2","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0900-1558","authenticated-orcid":true,"given":"Suchetha N.","family":"Kunnath","sequence":"first","affiliation":[{"name":"Knowledge Media Institute (KMi), The Open University, Milton Keynes, 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