Move Sigla to 094

[ahankinson]

This is a proposal to move the sigla field in institutions from 110 $g to 024. This move will allow for the capture of obsolete sigla, as well as 024 being a more appropriate field for this kind of data. (024 is "Other Standard Identifier", whereas 110 $g is "Miscellaneous Information")

The new arrangement would be:

• $a: Non-Repeatable. Holds the current siglum for an institution
• $2: Non-Repeatable. Would be the source of identifier, likely the string rism
• $q: Non-Repeatable. Would be the string siglum to mark the RISM identifier as a RISM siglum
• $z: Repeatable. Would hold all previous sigla that were assigned to that institution.

So, the 024 for https://rism.online/institutions/30077306 would be:

=024  ## $aV-CVbav $2rism $qsiglum $zI-RVat

One feature that was requested in the discussions of this change was that the Siglum entry be visually kept with the header information in 110 and not held in the "General" 024 section. This is to keep all the institution's "vitals" in one place.

So a user-friendly implementation might have a dedicated 024 entry in institutions in the same block as the 110, with $2 and $q already filled in when the record is saved, and the cataloger only needs to supply the values for $a and $z.

The data would need to be migrated. Since we don't have any formal way of tracking former sigla, there is no data to be migrated for $z, and these values would need to be supplied post hoc.

We would also need to inform the BSB of the potential change in data, and modify RISM Online once the data migration has happened.