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Discussed issue SEC-115. This is about an exchange-preferred identifier, such as the SEDOL code, which might be the preferred identifier for stocks listed on the London Stock Exchange, or CUSIP for the NYSE, for example. Issue SEC-115 suggests that we should eliminate the class in favor of the property, which should be a property of the listing as agreed on the call.
Issue SEC-116 - add synonym to Listing of 'market listing', remove hasIssue in favor of lists. Also, as of today, Listing does subclass SecurityRegistryEntry, so that aspect of this issue has been addressed. With respect to isCharacterizedBy Scheme - there should be a connection between any registry and the scheme that defines its contents - this should be raised against FBC.