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MRIS response to Inman’s “MLSs don’t have to supply RETS feeds”

June 14, 2010  |  by Marie

Matt Carter with Inman News recently published the article “MLSs don’t have to supply RETS feeds”, below is MRIS’ CIO Mike Belak’s response


MRIS agrees the current version of RETS provides great value. However, RETS has important limitations in our view. With improvements, we believe even greater value could be realized.  Mike Belak, chief information officer at MRIS, illustrates the work to be done:

  • True standardization of data: While RETS standardizes data transport, it’s not quite a true industry standard for the actual data being sent. Small discrepancies within thousands of data fields equal ongoing operating costs to use the data.
  • Greater openness and adoption of cross-industry standards: A common data standard will bring greater innovation and benefits for our industry. Because the “rest of the world” outside the real estate industry doesn’t use RETS, we can’t easily adopt innovative technologies used successfully by others out there.
  • Generate measurable cost savings & benefits: RETS implementation is more costly than it should be, mostly due to the technical support needed. A data standard that lowers operating costs would show real ROI to the industry and spread adoption to benefit all stakeholders.
  • Stronger governance and compliance via Mandatory Usage: RETS is promoted as a standard for our industry, but is not mandatory. Further, different versions exist. The resulting level of complexity does nothing to reduce operating costs or ease the way to compliance.


Full Text

To Mr. Matt Carter, Inman News —

NAR’s sponsorship and implementation of RETS in our industry provided needed direction and was a valuable step forward to promote an easier exchange of information between MLS, brokers and vendors.  The RETS standard enabled MRIS to provide CURE, our industry-leading data sharing product, to MLSs and agents across the country.  Currently, nearly 1 out of every 4 real estate agents is an active user of CURE.   While implementing this service, we discovered several opportunities for improvement in the current RETS standard.    These opportunities for improvement include:

  • True standardization of data.  While RETS standardizes data transport, it falls far short of a true industry standard for the actual data being sent.  Why?  Let’s explore a simple example.  If a real estate professional is looking at the individual data fields being sent in a message, numerous discrepancies can be found at both the data field name and data value levels.  One MLS may call a data field a “patio” while the same data field can be called a “lanai” by another MLS. One MLS may have data values for the data field “bathrooms” as (1, 2, 3 ,4…), while another MLS has data values for “bathrooms” as (1, 1.5, 2, 2.5, …).  While this sounds simple enough to translate and correct for a single data field, it still takes time, programming and money to make these adjustments.  Now multiply that cost by hundreds or thousands of data fields.  Don’t forget these translation costs are incurred by each participant in the data exchange.  Oh yes, there’s also an ongoing operating cost incurred each time a participant makes changes to data fields.  All of this complexity and cost can be currently incurred while an MLS is deemed RETS compliant.  


  • Greater openness and adoption of cross-industry standards.  While RETS creates a vital standard within our real estate industry, it doesn’t promote open, easy access to data outside our industry with other firms, vendors, new technologies, etc.  This situation can hamper innovation and slow adoption of new technologies in the real estate industry.  Why?  The rest of the world doesn’t use RETS.  This situation insulates current industry vendors while creating a barrier of entry for firms outside our industry.   For example, many readers of this article operate websites.  Let me ask you this question:  How many languages does your website support?   Would you ensure your website can be translated into Palenquero — a language spoken only by a community on Columbia’s Caribbean coast?   Probably not, as you wisely spend your money where you obtain the greatest return; so do firms and vendors in other industries.  By increasing openness and adopting standards already used in other industries, we can promote greater innovation and benefits for our industry.


  • Generate measurable cost savings & benefits.   The RETS website states: “RETS as a standard body is absolutely FREE. You will incur costs for developing solutions implementing RETS.”  That statement is correct, using RETS costs you money.  Correspondingly, the RETS website states: “Brokers, Agents and MLSs have been seeing the benefits of using RETS for the past several years.”  While I don’t have formal survey data, my informal conversations with MLS, brokers and vendors across the country echo a similar lament:  “Are we getting a good return on our investment costs?” In your article, you included Karen Kage, CEO of Michigan’s Realcomp II Ltd. MLS, saying  her information technology team has told her that there ‘can be a lot of support involved with RETS,’ as there are different versions of the standard.  This could be a barrier to MLSs offering this service if they do not have sufficient staff.”  That statement is absolutely correct.  The real opportunity for improvement in the future is to create a standard that lowers operating costs while providing measurable benefits for MLS, brokers, vendors, etc.


  • Stronger governance and compliance.  Improvements in the governance and compliance area would yield smart benefits for all users of RETS.  As noted in your article, usage of RETS is not mandatory and different versions exist.  As a result of these limitations, vendors often resort to providing their own APIs to provide solutions required by their customers, which can add additional complexity and further undermine the usage of RETS.  From a compliance perspective, we’ve encountered and reported problems with the compliance tool that impeded the RETS certification process.  In your article Kristen Carr, a RESO board member since 2007, summed it up nicely:  “…there were ‘a ton of business reasons’ why an MLS might not want to provide access to RETS listings, including staff skills and time, distrust of vendors, or a lack of appropriate agreements.”   A better approach to RETS governance and compliance would foster greater adoption and less compliance problems.

So how do we make these improvements?  MLSs are uniquely positioned to help make the needed improvements to RETS in the future.  In today’s difficult economic climate, providing strong business-oriented direction that generates measurable cost savings and benefits from the next version of the standard is a good start.  Having MLS work collaboratively with existing vendors to provide true out-of-the-box product support for RETS while encouraging participation (and maybe innovative competition) from vendors in other industries is a good second step. 

Thank you again for your time. Please feel free to contact me at  

Michael J. Belak, Chief Information Officer, MRIS.

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