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We also looked at the notion of a successor organization. FIBO includes properties for succeeds and precedes, which we use for trades already, but not for organizations. It should likely be a restriction on the legal entity, linking an entity to a successor entity. See https://search.gleif.org/#/record/0M0CQSYL9RIZJ193OT90 for an example (Pete will provide others).
Also added a property for linking an instrument to the currency it was issued in, which was a gap. See FBC-254.