MISMO Reference Model

The MISMO Reference Model is the foundation for most MISMO standards and for many MISMO-based proprietary products such as the GSEs' Uniform Mortgage Data Program (UMDP®) exchanges. The MISMO Reference Model consists of several components including:

  • The Logical Data Model which makes it easier for organizations to communicate with business partners regardless of the technologies they choose.
  • The XML Schema representation of the data and relationships that support industry business processes.
  • The Logical Data Dictionary (LDD) which provides a business centric view of the model.
  • The Version 3 SMART Doc® standards which provide formats for electronic formatting of documents; and more.

Version 3.6 includes updates to support the GSEs' updated residential appraisal data exchange, Uniform Appraisal Dataset (UAD®); Private Label RMBS rating agency asset valuation data exchange for faster, more efficient, and more accurate due diligence necessary for securitizing private label residential mortgages; exchange of closing instructions, improving communications and avoiding delays during closing between the lenders and closing agents; ability to electronically verify that data is consistent with information presented in a document, such as the loan application, and that the data has not been tampered with putting trust into the data through the Version 3 Verifiable Profile SMART Doc standard; enhancements to the MISMO API Toolkit, leveraging MISMO’s initiative to develop standards for consumer transactions; and much, much more. 

    Version 3.6 of the MISMO Reference Model was approved for Candidate Recommendation status in May of 2023. Updated versions of the Logical Data Model, XML Schema, and Logical Data Dictionary are included in the release.  The release also includes a change list and release notes.

    Historical versions of the MISMO Reference Model were comprised of the XML Schema and Logical Data Dictionary and can be found here.