MISMO Publishes New Version 3.6.2 Reference Model

WASHINGTON, D.C. (October 30, 2025) – MISMO®, the real estate finance industry's standards organization, today announced the publication of Version 3.6.2 of the MISMO Reference Model, which includes new data points, containers, and enumerations to support MISMO work products and other mortgage industry business content.

“The release of Version 3.6.2 of the MISMO Reference Model underscores our commitment to providing the industry with stable and reliable standards that evolve alongside the needs of the market,” said MISMO President Brian Vieaux. “This update enhances support for critical datasets and processes while ensuring seamless continuity for existing technical solutions.”

Version 3.6.2 of the MISMO Reference Model is a minor release with additive changes only and therefore it is expected that existing technical solutions require no change. Updates and enhancements to Version 3.6.2 of the MISMO Reference Model include the following:

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 confirms to the OpenAPI specification; the logical data dictionary (LDD) which provides a business centric view of the model; a Unique ID Matrix that can be leveraged to streamline impact analysis and to accelerate implementation efforts; and more.

The Version 3.6.2 MISMO Reference Model package provided for public comment contains the Version 3.6.2 release notes detailing included updates; XML schema files; YAML files; and the LDD. Version 3.6.2 of the MISMO Reference Model is fully backward compatible with version 3.6.1 and includes the MISMO Unique ID.

MISMO members are provided with a version comparison report that highlights new data points, containers, and enumerations.