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