IWorkspaceSpatialReferenceInfo is an optional interface that can be used by an application to retrieve the set of spatial references that are referenced by geodatasets in a Personal, File or ArcSDE geodatabase. It has a read-only property, SpatialReferenceInfo, that returns an enumerator that supports the IEnumSpatialReferenceInfo interface. The latter has a Next method that can be used to iterate over the spatial references and their spatial reference ID (SRID) within the geodatabase.