MISMO Version 3.6.1 Reference Model

MISMO is seeking public comment on Version 3.6.1 of the MISMO Reference Model, which includes new data points, containers, and enumerations to support regulatory requirements and other mortgage industry business content. The 60-day public comment period will run through April 25, 2025. 

The MISMO Reference Model includes an XML schema representation of the data and relationships that support industry business processes; a corresponding YAML file set that conforms to the OpenAPI specification; the logical data dictionary (LDD) which provides a business centric view of the model; and the MISMO SMART Doc® standards which provide formats for electronic formatting of documents; and more.

The Version 3.6.1 MISMO Reference Model package provided for public comment contains the Version 3.6.1 release notes and change list detailing included updates; XML schema files; YAML files; and the LDD.


What It Includes

The new Version 3.6.1 of the MISMO Reference Model updates and enhancements include:

  • Addition of data to support the bi-merge and credit modernization initiative and to enable trading partners to have the ability to clearly distinguish a credit request used to determine a consumer’s buying power versus a credit request to determine eligibility for an extension of credit;
  • Ability to electronically procure valuations through the new MISMO Appraisal Procurement Dataset and data points to track reconsiderations of value (ROVs);
  • New V3 SMART Doc® Security Instrument and Home Equity Line of Credit Agreement Specifications that provide the ability to electronically verify that data is consistent with information presented in a related document and that the data has not been modified;
  • Addition of greater support for the origination and underwriting of a reverse mortgage;
  • Addition of new fee type enumerations to align with fees commonly used by industry participants;
  • Addition of new data points to enable efficient exchange of housing counseling data between housing counselors and lenders;
  • Maintenance changes to add data points, enumerated values, containers, and acronyms as appropriate.

Access Information for Members

MISMO Members can access the Member Only version of the reference model & supporting components in the Resource Library housed here on MISMO's Collaboration Site, "MISMO Connect". 

The member version of the resource includes:

  • XML Schema
  • Enhanced Logical Data Dictionary (ELDD) with Unique IDs
  • YAML Files
  • Unique ID Matrix
  • Version Comparison Report
  • Release Notes

Access Information for Non-Members

Non-Members can access the reference model & supporting components listed below here:

  • XML Schema
  • Logical Data Dictionary (LDD)
  • Release Notes

Disclaimer

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