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RESO Committees and Workgroups

Specifications are a cumulative effort. Volunteers have worked to standardize the definitions and forms that MLSs use countrywide. The goal is to create data-sharing policies that provide a single point of entry to search multiple MLS data sets to the benefit of all. Please follow the links below to learn more about the RESO Technical Committee and the RESO workgroups. If you are interested in participating on a workgroup, please contact RESO Headquarters.


Technical Committee

The Technical Committee’s mission is to provide collaboration between the RESO Board of Directors, workgroup chairs, and the Executive Director.  The committee is chaired by a RESO Director who is a liaison facilitating communication and ensuring transparency and consistency between the workgroup chairs, the RESO Board of Directors and the Executive Director.  The committee reviews each individual workgroup activity and the chair assists the progress of workgroup approved motions through the RESO Board of Directors in conjunction with the Executive Director when applicable.

Marketing Committee

The RESO Marketing Committee is a standing committee that sets the vision for and aids in the development of the marketing strategy used to promote RESO’s mission and initiatives. The Marketing Committee may utilize strategies that may target potential volunteer groups to donate their time and skills on behalf of RESO.


Data Dictionary

The RESO Data Dictionary has two purposes.  First is to serve as a non-RETS guideline for a national standard for the fields and lookups (enumerations) in the MLS.  The second is as a common center for all expressions of fields and enumerations in the RETS standard. The workgroup purpose is to maintain and develop the Dictionary.

Internet Tracking

Internet Tracking data is a key component for any modern day data set. No longer is having the data secure and readily available enough. True analytics that show value are now expected and commonplace in the software industry. This workgroup would propose a recommended standard for tracking RETS vendor  activity, including the MLS listing.


Real Estate Data is typically delivered as a package comprised of a set of data for a specific business need.  The RESO Data Dictionary defines all the fields (and their specific characteristics) available to be included in a payload.  The Payloads Workgroup purpose is to define Payload Categories based upon Real Estate Industry business need and which fields are to be included in each Payload Category as specified within the RESO Data Dictionary.

Property Unique Identifier (PUID)

The RESO Unique Property Identifier workgroup addresses the issues resulting from the disparate set of identifier formats used to identify listing property records by creating a standard for a Unique Property Identifier (PUID). This workgroup will review and build on efforts from the U.S. government, public records industry and other data standards organizations to build the U.S. “definitive” standard for the Universal Property Identifier to be used for the North American real estate industry.

Research and Development

The purpose of the RESO Research & Development Workgroup is to solicit and review submitted business cases from the real estate community and identify how RESO can contribute to the benefit of that business process.

Transport/Web API

The mission of the Transport Workgroup is to provide technical processes for analyzing extensions to transport methods in current and future versions of the RETS specification. The current focus is to provide an up to date industry standard RESTful Web API interface for real estate transactions.

DLU August 14th, 2017