We have two tags and . I do not understand the difference between the two tags -- in part because in PostgreSQL pg_catalog is the schema for the system tables. But, I don't want to assume it's that way in the spec or the other database. However, if it is my suggestion that we merge the two, and keep system-tables with an alias from catalogs to system-tables

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    Catalog means something specific for versions of SQL Server from 2012 onwards. However, that doesn't mean that the tag is predominantly used to refer to this. – ConcernedOfTunbridgeWells Dec 12 '17 at 23:55

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