ISO/IEC 9075-11:2016 specifies an Information Schema and a Definition Schema that describes: - The structure and integrity constraints of SQL-data. - The security and authorization specifications relating to SQL-data. - The features and subfeatures 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