If the data has been transformed from one horizontal reference (originalReference) to a new one (as given under horizontalAdjustment of HorizontalReference) using a simple offset, then transform information should be provided here. For example, if the data at a scale of 1:250,000 has been transformed from NAD27 to NAD83 using a simple shift in x and y, the value for originalReference is nad27 and deltaX and deltaY give the shift values applied. (In this case, adjustment, as part of horizontal in the subclass GeodeticReferenceSystem, has the value nad83.) Comments may also be provided.