Web of Science (WOS) is a multidisciplinary database which, together with bibliographic information, includes reference lists from indexed publications, thus making it possible to search for citations and references.
WOS consists of a number of partial databases that cover different fields and different sources and periods of time. The original databases were Science Citation Index, Social Sciences Citation Index and Arts & Humanities Citation Index; however, modules for the product are continually being developed and expanded – e.g. Conference Proceedings Citation Index and Book Citation Index.
The individual modules have different coverage:
- Science Citation Index (SCI) Expanded: ~8,300 journal titles spread over 150 academic disciplines (from 1900-)
- Social Sciences Citation Index (SSCI): ~4,500 journal titles spread over 50 disciplines (from 1900-)
- Arts & Humanities Citation Index (A&HCI): ~2,300 journal titles + selected articles from another 6,000 journals (from 1975-)
Read more about the different modules and coverage.
When using WOS for citation counts, it is worth noting that not all research fields are covered equally. WOS covers mostly journal articles from international, English-language journals. Thus citation counts using WOS are difficult in research fields where another language is prevalent or where many publications are released in book form.
Read about Thomson Reuters' criteria for inclusion of journals in Web of Knowledge.
Students and academics at Danish universities may have access to WOS via the university library, if it has a licence. Contact your library for more information.