Corresponding C++ library: TG_Db 

Custom Attribute Class that is applied to a supplemental schema

Schema: Bentley_Standard_CustomAttributes, Version: 1.13, Class: SupplementalSchemaMetaData Available properties: "PrimarySchemaName"(string), "PrimarySchemaMajorVersion"(integer), "PrimarySchemaMinorVersion"(integer), "Precedence"(integer), "Purpose"(string), "IsUserSpecific"(bool)