The Web of Science Core Collection is a curated collection of over 20,000 peer-reviewed, high-quality scholarly journals published worldwide in over 250 science, social sciences, and humanities disciplines.  

Journals are selected for inclusion in the Web of Science Core Collection using a single set of twenty eight evaluation criteria journals: Twenty four quality criteria (designed to select for editorial rigour and best practice at the journal level) and four impact criteria designed to select the most influential journals in their respective fields.

Journals that meet the quality criteria enter Emerging Sources Citation Index (ESCI). Journals that meet the additional impact criteria enter Science Citation Index Expanded (SCIE), Social Sciences Citation Index (SSCI) or Arts & Humanities Citation Index (AHCI) depending on their subject area. 

These are dynamic collections subject to continuous curation to ensure journals are in the appropriate collection.   

Data taken from the Web of Science Core Collection is uniquely selective, based on an independent editorial process combined with over 50 years of essential, accurate and unique curation, resulting in their unparalleled data structure  

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