Documentation Portal Version History

Date	Version	Note
Oct. 30, 2023	v1	Initial release and publication of the ICPSR Metadata Documentation Portal.
Jan. 29, 2024	v2	Removed guidance regarding null entries for National Institute of Justice studies. Several fields previously required "None" when otherwise a field would be left blank. It was confirmed with the project managers this is no longer necessary NACJD-wide.
Mar. 22, 2024	v3	Added 'study number' and distributor 'order' elements to the schema to address earlier oversight.