Provide filtering ability for Alma Network Zone records

[blackwinter]

We need to be able to filter records belonging to the Alma Network Zone. The initial approach was to rely on the presence of the hbz ID (MARC 035$$a with prefix (DE-605), Lobid hbzId), but this is not sufficient:

1. Sometimes records in an Institution Zone erroneously include an hbz ID (e.g., TT050389906: 990178459700206446 and 990010880170206447).
2. ZDB records won't receive an hbz ID anymore starting with NZ phase 2.

So we need a different filter condition that excludes IZ records, but includes ZDB records. Potential candidates:

1. MARC 003=DE-655 (hbz Network Zone ISIL); this would require mapping the Control Number Identifier field.
2. MARC MBD$$M=49HBZ_NETWORK (hbz Network Zone Member code); this would require mapping the Member code field.

(NOTE: It's still unclear - to me, anyway - how exactly the records will look like in NZ phase 2; we might have to wait for the first publishing in order to determine a suitable solution.)

Whatever field is chosen, we just need to be able to query its existence ("exists": { "field": "isAlmaNz" }) or a boolean value ("term": { "isAlmaNz": "true" }); although querying a specific value would work just as well ("term": { "controlNumberIdentifier": "DE-655" } or "term": { "almaMemberCode": "49HBZ_NETWORK" }).

[TobiasNx]

How about a collection for NZ?

[blackwinter]

Do you mean inCollection? Yeah, sure, that should work. (It can be queried by id.)

[TobiasNx]

What about ALMA-MMS-ID with trailing 6441 as filter condition?

[blackwinter]

What about ALMA-MMS-ID with trailing 6441 as filter condition?

Yes, that should work as well. Should be equivalent to MBD$$M=49HBZ_NETWORK.

[TobiasNx]

This seems to work: https://alma.lobid.org/resources/search?q=inCollection.id%3A%22http%3A%2F%2Flobid.org%2Forganisations%2FDE-655%23!%22

[blackwinter]

Thanks, works as intended.