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Given the organization of science into disciplines, a key question is the sensitivity of such analyses to frame of reference. Our study examines this question using semantically themed citation networks. We observe that trends reported to be true across the scientific literature do not hold for focused citation networks, and we conclude that inferring novelty using co-citation analysis and random graph models benefits from disciplinary context. <\/jats:p>","DOI":"10.1162\/qss_a_00007","type":"journal-article","created":{"date-parts":[[2019,10,11]],"date-time":"2019-10-11T18:17:53Z","timestamp":1570817873000},"page":"264-276","update-policy":"https:\/\/doi.org\/10.1162\/mitpressjournals.corrections.policy","source":"Crossref","is-referenced-by-count":11,"title":["Co-citations in context: Disciplinary heterogeneity is relevant"],"prefix":"10.1162","volume":"1","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8766-6830","authenticated-orcid":true,"given":"James","family":"Bradley","sequence":"first","affiliation":[{"name":"Raymond A. 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