When you access data
you use an FDO provider to
connect directly to a data source, such as SDF, SHP, Oracle, SQL
Server, or ArcSDE, and work in its native format.
For FDO data sources
with geometry, you select the feature classes to include in your
A feature is the spatial
description of a real-world entity, such as a road, a utility pole,
or a river. Features are organized into collections, called feature classes,
and are stored in a spatial database or file. The spatial database
or file is sometimes referred to as a feature source.