Data Dictionary


MLSs have done a great job of embracing the Real Estate Standards Organization, the RESO Data Dictionary and RESO Web API. Today, 93% of all REALTORS® in America work with MLSs that are RESO Certified. RESO volunteers have worked tirelessly for years to get us to this stage.  MLSs have done the hard work to make RESO data standards available to their members and technology partners. We’re on the cusp of greatness with RESO. While just about all brokers in America can leverage RESO standards on their website, CRM and other marketing solutions now, very few are aware of the power of RESO standards.. Even fewer understand the inherent value of a consistent set of fields across every MLS in America and how that will make it a lot easier for innovative products to launch in even the smallest areas. What needs to be done? MLSs need to help brokers understand how RESO standardized data delivered via the RESO Web API will help them bring new technology solutions to market and differentiate their messaging, lead gen, market statistics and green marketing. The industry needs to drive DEMAND for RESO Data Dictionary and Web API based data feeds.  We will know that we have done our job when brokers insist on using RESO data feeds delivered from their local MLS to fuel their IDX and technology solutions. It’s incumbent upon all of us to promote the advantages and availability of RESO-certified data feeds so that technology companies and brokers can take advantage of this powerful resource. FREE RESO Marketing Toolkit WAV Group has helped RESO create a Marketing Toolkit complete with promotional content, webinars, banner ads, presentations, logos and other elements designed to help you promote the availability of RESO data feeds in your local market. We would like to encourage every MLS to take advantage of these FREE marketing resources to help increase utilization of RESO certified data. It’s a very tangible way to demonstrate how much you are looking out for your broker’s best interest. If you can support your technology partners to convert to the RESO Data Dictionary, you will be doing your subscribers a great service. Click HERE to see a presentation of all of the components of the Marketing Toolkit delivered at the 2017 RES0 Technology Summit. It’s really easy to take advantage of this free marketing service. Sign up for the FREE Marketing Toolkit HERE […]


MLSs and Brokers Misunderstand RESO

by Victor Lund on October 7, 2016

Our industry is in the dawn of a new day. With some measure of struggle, the Nations’ MLSs and their Vendors have endeavored to adopt a set of standard fields for standardized data transportation from the MLS system to applications that support the real estate industry.  I consider this the dawn of the effort because, for the very first time, MLS adoption of the real estate standards are more strictly mandated by the National Association of REALTORS® MLS Policy. For years, the National Association of REALTORS® supported and funded the Real Estate Standards Organization, which is referred to by its acronym, RESO. Despite being a free standing non-for profit with an independent board of directors, the bulk of the funding for this standards organization came from NAR, and was supplemented by MLS vendors and a few others. Today, the Real Estate Standards Organization has blossomed into one of the most collaborative industry wide efforts we have ever seen, with funding from vendors, brokers, Associations, and MLSs. The effort ties MLS Vendors, Broker and Agent Technology Vendors, MLS Operators, Associations of REALTORS® and many brokerages together. This group is funding and directing a massive overhaul of how information (data) is used today, and laying a strong foundation for the future. It is inspired transformation. Like anything new, different, and technical, there is also a massive level of misunderstanding that is frustrating the efforts. In some small way, my hope is to clarify some things to set some people straight. We try hard to understand before disagreeing, and disagree without being disagreeable. The MLS system has a native database. When agents enter listing information into that database, they most often enter data that is not RESO certified. We refer to this as entering data into the NATIVE MLS Database. Despite the 1,078 fields and 1,475 values within the most current version of the RESO Data Dictionary, the MLS has additional fields, business rules, database logic, and numerated values that are beyond RESO standards today. With few exceptions, NATIVE MLS Databases and listing input forms have not been converted to the RESO Data Dictionary standards. If MLSs were to adopt the RESO Data Dictionary standards for MLS fields, it would require an MLS conversion. I imagine that most of you reading this have suffered through an MLS conversion, so you can appreciate the expense and pain that it would cause to convert all […]

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Quarterbacking the adoption of the RESO Data Dictionary

by Marilyn Wilson on October 8, 2015

An inside look with the Workgroup’s Chair, Rob Larson of CRMLS By Jeremy Crawford He’s at the helm of what has been hailed as real estate’s “Rosetta Stone.” Rob Larson, the Chief Information Officer of the nation’s largest Multiple Listing Service, CRMLS, chairs the RESO Data Dictionary Workgroup. The Workgroup is responsible for the real estate industry’s new and growing set of property data listing standards, which is quickly approaching the NAR mandated deadline of January 1, 2016 for Data Dictionary adoption. Larson and CRMLS are testaments to the old adage “Practice what you preach.” At CRMLS, Rob has lead a holistic Data Dictionary effort – called Data Dictionary Plus – that not only deploys the required Data Dictionary core property data fields (161), but CRMLS is converting all fields whose definition matches an entry in the Data Dictionary. Larson also notes there are additional fields in his MLS system that are not in the RESO Dictionary, but is renaming those fields to match the Data Dictionary naming conventions. Following the naming convention on non-required fields is Larson’s “Plus”, but it is not a RESO requirement. RESO Data Dictionary Certification has several levels of Certification. Today, the focus is on the mandate – Core Certification – yet MLS firms also can achieve Bronze, Silver, Gold and the highest level, Platinum Certification. Once CRMLS is Data Dictionary certified, they will have leapfrogged to achieve Platinum Certification, joining MetroList in Sacramento, which is already Platinum Certified. Though Larson admits, “implementing the platinum level dictionary not only in RETS, but all the way back into our MLS system will be a challenge.” “When I started the Dictionary, I included the concept of adopting the Dictionary, not just in the RETS interface, but in the MLS Input, Search and Display as well. From the get-go I felt this was the right course of action because I believe in a consistent experience for my members and their clients,” Larson says. He explains, “Application vendors who use RETS are inevitably going to have their search and display mirror the fields they see coming from RETS. By taking the unrequired step of adopting the Dictionary in your MLS system, you’ll standardize the members experience as they use the variety of software options available today.” Larson points to the fact that MLS members are accessing MLS data in a lot more places than just through their MLS system; […]