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RESO Transport Workgroup

RESO Transport Workgroup - Specifications and Change Proposals

RESO Endorsements

RESO Endorsements are modular specifications that are associated with a given transport protocol.


RESO Change Proposal Process

Transport Specification Process



Ratified standards have been adopted by the Transport Workgroup and RESO as an organization.

Proposals that require certification must have an adopted specification and testing rules, and production-ready testing tools before being ratified. Standards may be ratified before they’re ready to be shown in RESO Analytics.

RCP Name Version Date
RCP-036 Data Dictionary with Lookup Resource 1.7 Jan 2021
RCP-037 Web API Core 2.0 Jan 2021
RCP-038 Payloads (with IDX Payload) 1.7 Aug 2021


Approved proposals have both specification and testing rules approved by Transport and Certification, and two verified implementations from different providers.

RCP Name Version Date
RCP-040 Data Dictionary 2.0 Sept 2022
RCP-025 RESO Common Format DD 1.7 Sept 2023


Draft proposals have both specification and testing rules approved by Transport and Certification, and are awaiting implementations and community review prior to Transport approval.

RCP Name Version Date
RCP-010 Web API Add/Edit 2.0.0 Apr 2023
RCP-019 Web API Validation Expressions 2.0.0 Apr 2018


In progress proposals are ones that are in review by Transport and Certification. See the RESO RCP Process and section on new change proposals.

RCP Name Version Date
RCP-022 Autofill Service 1.0.0 Apr 2019
RCP-027 EntityEvent Resource and Replication DD 2.0 Apr 2019
RCP-028 Push Replication with EntityEvent and Web Hooks DD 2.0 Feb 2020
RCP-035 Supporting Single Feeds DD 2.1 Sept 2023
RCP-039 Web API Core 2.1.0 Apr 2022
RCP-041 Payloads DD 2.0 Apr 2022
RCP-042 Model and Field Resources DD 2.1 Feb 2023
RCP-043 Local Fields and Predictability DD 2.1 Feb 2023
RCP-044 Metadata Internationalization and Locale DD 2.1 Feb 2023
RCP-045 Legacy and/or Deprecated Data Elements DD 2.1 Sept 2023


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Certification and RESO Analytics

More information about RESO Certification.

About RESO

RESO Data Dictionary