How often data are updated
The data files are updated monthly to cover the previous calendar month. The data file for any single month is available for download as a flat file. There will also be one data file covering a full calendar year (starting 01 January) available as a flat file, with data added each calendar month.
You should be aware that these files can be very large (monthly files vary from 125MB to 600MB, and annual files are over 1GB). You can find the data files on the OpenURL Router Data page.