The format supports any range of real estate data, including standard and unique local property details, transaction information, appraisal, tours, assessment, showings, media, and member records.More Info on RESO Common...
Not all real estate entities use the Web API, but they all have technology products that receive data. RESO Common Format (RCF) ensures that data can be easily shared and understood across various platforms, reducing errors, improving efficiency and enabling new...
RESO Common Format (RCF) is an API-agnostic standardized format for data exchange by all parties in the real estate industry, ensuring consistency and interoperability. RCF is a normative JSON data format that corresponds with the RESO Data Dictionary and is...
The Data Dictionary specification includes validation rules that are enforced to ensure that data entries meet specified criteria, such as value ranges or formats, maintaining data quality and integrity.More Info on Data...
The Lookup Resource defines the values for lookups (enumerations) in metadata. It contains predefined lists of acceptable values for specific fields and alternative mappings for deprecated items. The Lookup Resource is not currently mandatory for certification, but it...
New fields are added to the Data Dictionary year-round and often ratified annually in new versions of the standard to support evolving industry needs.More Info on Data Dictionary
Contributors include technologists and business leaders from MLSs, REALTOR® associations, brokerages and vendors. Proposals can be submitted to RESO staff and the Data Dictionary Workgroup at dd@reso.org.More Info on Data...
RESO provides a standard for delivering multi-language metadata in the Data Dictionary, and it has been extended to other languages in several countries.More Info on Data Dictionary
Implementation of the entire Data Dictionary is not expected or required for certification. The dictionary standard’s omissibility feature allows data providers to only use the elements relevant to their specific needs.More Info on Extensibility & Omissibility in...
The Data Dictionary’s extensibility feature means that data providers can create new local fields to address specific needs that are not currently covered by the Data Dictionary and still be in compliance with the standard for certification.More Info on Extensibility...
Extensibility with the Data Dictionary means data providers can create new local fields to address specific needs that are not currently covered by the Data Dictionary and still be in compliance with the standard. Omissibility allows data providers to exclude fields...
The Data Dictionary Wiki provides detailed information on data resources, fields and lookups (aka enumerations), guiding the development of data systems. It has extensive cross-links to guide users through the connected layers of the dictionary.More Info on Data...
Benefits include simplified integrations, faster creation of new tools, a seal of approval from RESO certification and enhanced industry innovations, competition and collaboration.More Info on Data Dictionary
The current Data Dictionary can be accessed via the DD 2.0 Wiki at ddwiki.reso.org. It can also be downloaded in spreadsheet format.More Info on Data Dictionary Wiki
Lookups are specific types of fields with options for values, such as the lookup field Fencing with lookup values for Vinyl, Wood, Wrought Iron and 26 other lookups.More Info on Data Dictionary
Fields are specific data points grouped together in resources. For example, ListPrice and StandardStatus are fields within the Property Resource.More Info on Data Dictionary
Resources are the highest level categorization in the Data Dictionary. Property, Member (i.e., real estate agents), Office (i.e., real estate brokers) and Media (i.e., photographs, videos, virtual tours) are examples of resources. More Info on Data Dictionary...
The main components of the Data Dictionary are a tree structure of resources, fields and lookups (aka enumerations). Resources are major categories such as Property, Member (i.e., real estate agents), Office (i.e., real estate brokers) and Media (i.e., photographs,...
The RESO Data Dictionary was developed to standardize data terms and structures to create efficiency in the connected digital real estate industry, which evolved from printed MLS books and proprietary legacy computer systems. More Info on Data Dictionary...
The RESO Data Dictionary is the real estate industry’s universal language for data. It empowers a wide range of systems to talk to each other in a seamless manner. The Data Dictionary provides a format for industry standard data, unique local data, international...
The proposal for Multiple Metadata Locales accommodates internationalization and localization needs in real estate data standards. They allow real estate systems to handle metadata in various languages and regional formats.More Info on Metadata Internationalization...
The RESO LocalData field addresses the need for predictability and flexibility when handling local MLS data fields.More Info on Local Fields and Predictability
The Payloads 2.0 specification standardizes rules for the structure and format of the property records delivered via Web API services.More Info on Payloads
The Single Feed proposal is about supporting single feeds for data consumers, allowing them to ingest only one feed while still accessing all necessary records and fields. It addresses the challenge of data consumers having to manage multiple feeds, such as IDX and...
