MDAC 2.5 SDK - OLE DB Programmer's Reference
Chapter 1: Overview of OLE DB

Transaction Management

OLE DB defines a basic set of interfaces for transaction management. A transaction enables consumers to define units of work within a provider. These units of work have the atomicity, concurrency, isolation, and durability (ACID) properties. Transactions allow the specification of various isolation levels to enable more flexible access to data among concurrent consumers.