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Hey folks, The FOLIO LSP uses UUIDs (https://en.wikipedia.org/wiki/Universally_unique_identifier) internally to uniquely identify all things, including bibliographic instances. When exchanging instance entities with other systems using MARC (bibliographic), we'd kind of like to use those UUIDs as our 001 identifiers since they're the closest thing to a true system ID we have. But I wonder if anyone has tried this and experienced problems with MARC consumers croaking on something like 001 123e4567-e89b-12d3-a456-426655440000 which is not your grandfather's identifier. The LOC MARC documentation is silent on the length of the 001 field but the MARCBreaker/maker software recommends staying within 12 characters... I can imagine if some systems wanted to stick the identifier in a fixed-with database table, hilarity might ensue. Any thoughts? --Sebastian