The driver is an ODBC 3.5 driver, and uses the driver manager to provide the depreciated and old ODBC 2 functions. The driver reports via SQLGetInfo exactly the level of conformance and behavior of the driver, but to summarize:
The driver conforms to all the core level requirements,
The driver conforms to 104 and 109 of Level 1
The driver conforms to 202, 205, 209 and 211 of Level 2 interface conformance.
The driver implements all ODBC 3 functions with the exception of:
SQLBrowseConnect, SQLBulkOperations, SQLSetPos.
The driver only supports FORWARD_ONLY cursors, as this is the only type supported by InterBase. This means it will work with ADO snapshots but not dynasets.