How can a lender determine what the “GSE-specific” legacy dataset should look like in the MISMO XML format?
Each GSE has updated its previously released mapping guidance and identified the appropriate ULDD data points to include in the GSE-specific file that is required for loans with application dates before December 1, 2011 that are delivered on or after March 19, 2012. Please see the Freddie Mac Appendix D, Freddie Mac XML Data Requirements Reference Tool, and/or the Fannie Mae Appendix D, Fannie Mae XML Data Requirements.
