Validation of controlled vocabulary

[dolsysmith]

Data entry in the UI is limited by the values available in the drop-down menus for fields like "GW Affiliation" and "Resource Type," but I don't believe that's the case through the Rake ingest task and/or (possibly) Bulkrax. At least, some non-standard values have crept in over time, like Book review instead of Book Review or article instead of Article.

One-time remediation would be fairly straightforward. But it would be good to ensure validation going forward.

To do:

1. Confirm whether Bulkrax performs field validation. If so, we can probably just close this ticket, since that's the main route of bulk ingest now.
2. If not, investigate what it would involve to implement validation in Bulkrax.