The database collects the citations done by scientific authors to create links and relations between titles with similar topics. By doing so, the resource produces indexes of international scientific periodicals and academic books. It contains the following archives:
- Science Citation index Expanded (SCI-EXPANDED): from 1985
- Social Science Citation Index (SSCI): from 1985
- Art and Humanities Citation Index (A&HCI): from 1985
- Conference Proceedings Citation Index- Social Science & Humanities (CPCI-SSH): from 1990
- Book Citation Index– Social Sciences & Humanities (BKCI-SSH): from 2005
- Emerging Sources Citation Index (ESCI); from 2015