Specifies an Information Schema and a Definition Schema that describes: - The SQL object identifier of ISO/IEC 9075. - The structure and integrity constraints of SQL-data. - The security and authorization specifications relating to SQL-data. - The features, subfeatures, and packages of ISO/IEC 9075, and the support that each of these has in an SQL implementation. - The SQL implementation information and sizing items of ISO/IEC 9075 and the values supported by an SQL implementation.