DataSource2 provides a way for data source indexing applications to obtain information about each document that is indexed, and provides better support for indexing binary data than DataSource.

DataSource3 extends DataSource2 to add a way to provide binary documents as an object that implements seek(), read(), and getLength() methods.

IIndexStatusHandler provides an interface to obtain detailed information on the progress of an index update.

Interface for the dataSourceToIndex member of IndexJob, for indexing non-file data sources such as databases.

Interface for returning binary documents through the DataSource3 interface.