Search previous references from Calm

[jtweed]

Background

Some archive works from Calm have previous reference numbers, which can be used to track down things that have changed reference during re-cataloguing.

We want to bring these previous references in as identifiers, so that they are picked up in search and the works can still be found if someone only has the old reference.

Implementation

The field in Calm is PreviousNumbers, suggestion for the identifier type calm-previous-number.

There can be multiple values in this field, which appear to be separated by semicolons. These should be split into multiple identifiers, not brought in as a single string.

Examples

• PP/DWW/E/1/47 should also be findable in search by PP/DWW/47
• WF/E/02/01/01/29 should also be findable in search by Acc87/33/71, WGA331 and WF Acc Box81

[alexwlchan]

I've put a list of all the identifiers this would add in Slack: https://wellcome.slack.com/archives/C016NQB58N4/p1629361420009400

[alexwlchan]

I would be extremely wary of bringing that list in unmoderated, because some of those values are likely to throw off search – e.g. one of the PreviousNumbers values is “F” and “G”

(I don’t want to attach the list to the ticket because I haven’t reviewed it for non-public info)