SpatialContextExtentType
enum SpatialContextExtentType
  The SpatialContextExtentType enumeration defines how the extent of a context should be handled by the provider. () Enumerator:
  SpatialContextExtentType_Static | The spatial extent of the context is static and must be specified when the context is created.
  SpatialContextExtentType_Dynamic | The spatial extent of the context is dynamic and changes as data is added and removed from the context.