API conformance levels are used to categorize the sets of ODBC API function calls that are supported by a driver. To simplify specification of API (or interface) conformance, ODBC defines three API conformance levels: Core, Level 1, and Level 2.
Note: f90SQL interface to the ODBC-API uses the same name of ODBC functions prefixed with f90. For example, ODBC-API function SQLAllocHandle is defined in f90SQL as the library subroutine f90SQLAllocHandle.