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MISMO Publishes New Engineering Guideline For Extending A Standard MISMO XML Schema

MISMO, the real estate finance industry’s standards organization, published the new MISMO Engineering Guideline (MEG) for Extending a Standard MISMO XML Schema (MEG 0025). 

“The MISMO MEGs ensure that work products adhere to all applicable technology standards, are produced in a consistent fashion, and meet the needs of the mortgage industry,” said David Coleman, MISMO President.

MEG 0025 provides guidance on how to extend the MISMO Version 3.x XML schema – providing an orderly way of enabling a message to hold additional data needed for mortgage processing that is not included in a specific MISMO XML schema version. The goals of the MISMO Extension Model are to:

  • Allow any container element to be extended (added on to);
  • Identify and separate MISMO data and extended data;
  • Allow extensions from multiple organizations to coexist in a single XML instance including within the same container;
  • Allow simultaneous schema validation of MISMO and OTHER content, and
  • Additional details are provided in the MEG for handling EXTENSION containers and attributes.