The GWAS Catalog's complete data in tab-delimited format (www.ebi.ac.uk/gwas/docs/downloads) is primarily used by bioinformaticians for bulk data access, allowing large-scale analysis of the data, annotation with additional data or integration into resources, e.g. Ensembl. We have expanded the range of download files available, with separate files for all associations and all studies, both with and without ontology mappings, and for ancestry data. We retained the original file format for association data, including all column headings, in order to provide backwards compatibility for programmatic parsing of the data. Studies are now included in a separate spreadsheet which provides a full list of all studies with a count of how many associations were identified for each study. We also provide a dedicated mapping spreadsheet between all reported GWAS Catalog traits and ontology terms, along with the GWAS diagram trait category. This allows users to identify the child terms included under each higher-level trait category on the GWAS diagram for example congenital heart disease is a cardiovascular disease.
