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Newsletter Summary
- RESO is heading to Louisville: 2025 Fall Conference preview
- Get ready for the International MLS Forum in Toronto in September
- It’s a first! An MLS in Europe gets RESO certified!
- Read the 2025 Spring Conference recap
- See the 2025 RESO award winners
- Data Dictionary 2.0 certifications kick into high gear
- Three Questions with Marinda Neumann and Brian Tepfer
RESO 2025 Fall Conference:
Registration is open for the 2025 RESO Fall Conference, which will be held October 21–23 at the Omni Louisville Hotel.
Per usual, we expect our hotel block to sell out, so don’t delay! | IT’S NOT TOO EARLY TO REGISTER!
Visit the conference site to register, arrange your hotel stay, submit a speaker request or sponsor the event. | VISIT SITE
Bonus: FIND YOUR NONSTOP FLIGHT TO LOUISVILLE!
On the RESO Blog
RESO 2025 Spring Conference Recap
The messages, products and projects shared in presentations, roundtables, workgroup meetings and hallway conversations energized the proptech audience. The RESO mission is on track for more great things ahead!
Celebrating the 2025 RESO Award Winners
RESO is proud to recognize the outstanding individuals and organizations driving innovation and progress in real estate data standards. The Leading Edge Award recognizes organizations that champion RESO standards, international efforts and educational initiatives. Contributor Awards honor individuals who have made a significant impact within RESO workgroups, pushing forward action items that enhance industry-wide interoperability and efficiency.
New Subgroups / Online Voting
New Subgroups
Several new subgroups have sprung up this spring, so in lieu of our monthly Product Updates feature, we are introducing you to them. Email dd@reso.org if you would like to participate in any of these subgroups.
ActivityPub Subgroup
This group (under the Transport Workgroup) will evaluate how to use ActivityPub to implement a resolution protocol for the RESO Unique Licensee Identifier (ULI), as well as how it can be used to provide interoperability throughout the listing lifecycle. ActivityPub has recently been discussed in the Interoperability Workgroup, including its emphasis on protocol over platform – a focus on open, decentralized systems built upon protocols. This shift in focus offers greater flexibility by allowing different systems to interact with each other with less customization required.
Duplication Subgroup
The goal of this subgroup is to identify, classify and define duplication in the Data Dictionary. The group will also identify duplication that remains useful to retain, the existence of which should be clearly communicated to users. Any recommendations for deduplication, a method to communicate duplication or other changes will be sent to the Data Dictionary Workgroup.
Global Subgroup
This group will identify areas of the Data Dictionary where enhancements to facilitate international use may be made. The group will then submit a proposal for any additions or changes to the main workgroup for approval. See Data Dictionary Global Subgroup Proposal for further information.
Here are two current requests related to international use of the Data Dictionary:
- Currency Types and Currency Conversion for International Markets
- Proposal for Energy Performance Certificates for the EU in the Data Dictionary
Multi-Select Lookups Subgroup
Many fields have lookups that could go together or stand on their own. Example fields include PatioAndPorchFeatures and Flooring. Example lookups include Porch, Patio, Screened which could be Screened Porch or Screened Patio. Data consumers do not know whether individual lookups go together. This subgroup will identify all fields with these instances and make recommendations to address them.
New Construction Subgroup
The goal of this reformed subgroup will be to add data elements to better convey new construction-specific information. The group will address the New Construction Development Data Elements and New Construction Data Fields business cases from the R&D Workgroup. Metadata from construction-focused organizations has been obtained.
Move to Online Voting
A system to vote asynchronously on Data Dictionary proposals is being developed. This will replace or be an addition to the typical Zoom voting done during meetings or live conferences.
CATCH UP ON ALL RESO PRODUCT UPDATES
Intentionally International
International MLS Forum in Toronto
RESO invites you to the 3rd International MLS Forum in Toronto, September 25–26, 2025.
The forum will begin at the midday conclusion of the CMLS conference at the same venue.
Video: Learn how transparent marketplaces move inventory.
Global Standards Decoded: Why MLSs in Paris and Beyond are Choosing RESO Standards
Open standards that cross borders are everywhere. Wi-Fi, Bluetooth, PDF and USB are just a few examples of open standards that people and companies use in their day-to-day business to interact with others. They provide a transparent set of rules for the parties to operate within, and they increase the trust and efficiency of transactions. RESO’s standards make this possible for real estate technology everywhere.
Certification Update
France’s premier real estate association, the Syndicat National des Professionnels Immobiliers (SNPI), became the first MLS in Europe to be fully certified on Data Dictionary 2.0 and Web API 2.0.0. Representing nearly 15,000 member organizations working as agents, property managers, trustees and negotiators, SNPI’s certification establishes the organization as a data powerhouse in the international marketplace.
The MLS’s 120,000 active listings will now be available in a format that is translatable to any language and accessible via a standardized API in any market in which SNPI chooses to do business. It’s a remarkable achievement on its own and a symbol of the broad growth in demand for global real estate data standards.
The following organizations also recently achieved Data Dictionary 2.0 certification:
- Adirondack-Champlain Valley MLS
- California Regional Multiple Listing Service (CRMLS)
- Doorify MLS
- Global MLS
- Hernando County Association of REALTORS®
- MLS United
- Mid-Kansas MLS (Prairie Land REALTORS®)
- Multiple Listing Service of Spartanburg
- Northwest Indiana REALTORS® Association
- Pike/Wayne Association of REALTORS®
- realMLS (Northeast Florida Multiple Listing Service)
- Realtracs
- Reelfoot Regional Association of REALTORS®
- River Counties Association of REALTORS®
- Southern Missouri Regional MLS
- Southern New Mexico MLS (Las Cruces Association of REALTORS®)
- Space Coast MLS (Space Coast Association of REALTORS®)
- Sunflower Association of REALTORS®
View results in RESO Analytics or see RESO Certification Statuses & Map for all MLSs. Contact your vendor for certification questions and dev@reso.org for technical questions.
New Members
National Association of Realtors – India (NAR-INDIA)
NAR-INDIA is the top representative body and advocacy group for the real estate industry in India. It facilitates standards, accreditation and professional development for more than 30,000 members and offers comprehensive resources for all industry stakeholders.
Courted
Courted provides an AI-powered platform that helps brokerages recruit new agents, retain top performers and gain deeper market insights. The platform delivers predictive analytics and real-time market intelligence to support strategic decision-making and growth.
REalchemy
REalchemy was formed by Bright MLS and California Regional MLS (CRMLS) with the goal of building software solutions that drive value and better customer experiences for agents, brokers and MLS organizations. They offer consulting, data and operations services to various ventures within the real estate space.
Baas Realty
Cindy Baas is a real estate expert dedicated to helping people in the North Texas area buy, sell and build homes.
Smart Ideal World
Smart Ideal World creates innovative solutions that simplify processes, connect people and add value to businesses and communities. The company develops platforms that foster collaboration, transparency and efficiency across industries. They are the maker of Sync MLS, an AI-driven database featuring up-to-date listings of properties for sale or rent in Portugal.
RESO’s Working with Real Estate Data – Business (RED-B)
RED-B provides a data flow journey through organized real estate. With nearly 1,400 students and more than 1,000 completed designations, the course continues to empower professionals in brokerage, technology and MLS roles with essential data knowledge.
This self-paced online course provides:
- a popular option for onboarding new employees and volunteer leaders.
- education for both nontechnical and technical professionals.
- a RED-B designation upon completion.
LEARN MORE | ALL RED-B DESIGNEES
Congratulations to Arizona Regional MLS, Doorify MLS, Homes.com, Realtor.com and Zillow on winning the 2025 Leading Edge Award for leadership in promoting industry education.
Three Questions
The Three Questions interview series introduces you to real estate professionals on a personal level every other Friday. | VISIT THE THREE QUESTIONS ARCHIVE
Recent entries:
RESO Workgroup Meetings
Research & Development Workgroup | April 15, 2025
An update was given on the Unique Licensee Identifier (ULI), and attendees were informed on how to submit business cases or other topics to the R&D Workgroup. | NOTES
Interoperability Workgroup | April 16, 2025
The chairs presented the core idea of protocol over platform, the potential for using ActivityPub protocol to improve interoperability and examples of how its adoption can lessen the need for custom development. | NOTES
Data Dictionary Workgroup | April 16, 2025
The first half of the meeting was a high-level overview of the Data Dictionary, the workgroup, versioning and how changes are put in place.The second half covered current topics and subgroup activity. | NOTES
Fast Track Subgroup | April 22, 2025
The group continued its work with the Fast Track Suggestions Review sheet, which shows previously approved Fast Track suggestions that have been sent back to the group for reconsideration. Several suggestions were approved, while others were recommended to be sent back to the main Data Dictionary Workgroup for more in-depth discussion. For example, a general “Commercial” lookup is highly used as both a PropertyType and PropertySubType in the aggregate data but is not currently an option in the Data Dictionary. Several action items were identified for the main Data Dictionary Workgroup regarding Commercial, Business and Auction-related lookups, along with Modular Homes. | NOTES
Duplication Subgroup | April 24, 2025
The initial meeting of the Duplication Subgroup outlined the goals of identifying, classifying and making recommendations on duplicate data elements in the Data Dictionary. The Data Dictionary Duplication sheet, which shows existing duplication and each data element’s usage, was shared with the group. The group may review and suggest additions or changes to the sheet on the Duplication Subgroup and Duplication Spreadsheet post. Different types of duplication were identified and defined, which will be assigned to the duplicate data elements at subsequent meetings. | NOTES
Upcoming RESO Workgroup Meetings and Key Topics
Here are the major topics of discussion for next month’s workgroup meetings. Members can review workgroup agendas in the RESO Workgroup Collaboration System. | JOIN A WORKGROUP
May 13: Interoperability – Recently promoted investigation of ActivityPub protocol into a subgroup; awaiting approval of payload packages by Data Dictionary Workgroup for OM, AMS, Appraisals and Client Contracts
May 14: Bulk Sale – In pursuit of a PackageSale Resource
May 15: Data Dictionary – Energy Performance Certificates for the EU; Currency for International Markets; Data Dictionary Payload Additions; Additional Living Quarters Shape Proposal, Disaster Fields, High-Speed Internet, Territories of the U.S., Data Dictionary Definitions Revisions
May 15: Certification – Standardizing school and city information, Delayed Marketing Exempt Listing (DMEI), ModificationTimestamp issues, custom fields, deletions
May 20: Fast Track – Meetings are centered around reviewing the Fast Track Suggestions Review sheet, from which decisions currently need to be made about treatment of fields related to Auction, Commercial, Business Opportunity and Modular Homes
May 22: Duplication – Review of sheet that shows a collection of prominent duplications and aggregate usage data for each data element; see Duplication Subgroup and Duplication Spreadsheet post for more information
June 2: Transport – Data Dictionary 2.1 updates, Days on Market calculations, Subscriptions and Filtering, Data Provenance, Versioning Updates, Unique Licensee Identifier (ULI) Resolution Protocol, New ActivityPub Subgroup
June 5: Research & Development – New business cases now being accepted
June 6: ActivityPub – Inaugural meeting about how to use ActivityPub for the ULI and other points of interoperability
