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Scopus is a scientific abstract and citation database, launched by the academic publisher Elsevier as a competitor to older Web of Science in 2004. [1] An ensuing competition between the two databases has been characterized as "intense" and is considered to significantly benefit their users in terms of continuous improvent in coverage, search/analysis capabilities, but not in price.
The same is true for more comprehensive databases such as Ulrich's Web which lists as many as 70,000 journals, [22] while Scopus has fewer than 50% of these, and WoS has fewer than 25%. [12] While Scopus is larger and geographically broader than WoS, it still only covers a fraction of journal publishing outside North America and Europe.
In any given year, the CiteScore of a journal is the number of citations, received in that year and in previous three years, for documents published in the journal during the total period (four years), divided by the total number of published documents (articles, reviews, conference papers, book chapters, and data papers) in the journal during the same four-year period: [3]
Logo in 2014. The Web of Science (WoS; previously known as Web of Knowledge) is a paid-access platform that provides (typically via the internet) access to multiple databases that provide reference and citation data from academic journals, conference proceedings, and other documents in various academic disciplines.
A journal's SJR indicator is a numeric value representing the average number of weighted citations received during a selected year per document published in that journal during the previous three years, as indexed by Scopus. Higher SJR indicator values are meant to indicate greater journal prestige.
"Impact of data sources on citation counts and rankings of LIS faculty: Web of science versus scopus and google scholar" (PDF). Journal of the American Society for Information Science and Technology .
Clarivate [6] was formerly the Intellectual Property and Science division of Thomson Reuters.Before 2008, it was known as Thomson Scientific. [7] In 2016, Thomson Reuters struck a $3.55 billion deal in which they spun it off as an independent company, and sold it to private-equity firms Onex Corporation and Baring Private Equity Asia.
the number of Diamond OA journals is very large (>29,000), but only ca. a third of them registered in DOAJ, and only ca. 5% are indexed in either Scopus or Web of Science. Over half of these Diamond OA journals publish 25 articles per year or fewer.