OpenRTB 2.x specification, from 2.6 onward
https://iabtechlab.com/openrtb
https://github.com/InteractiveAdvertisingBureau/AdCOM
As of OpenRTB 2.6-202211, OpenRTB's version number is only incremented on breaking changes. In other words, OpenRTB 2.7 should be considered a distinct version from OpenRTB 2.6 when there is a need for distinguishing versions. For example, a demand source might regard the version header when parsing a bid request received from a supply source. See OpenRTB Principles.
The current version of the OpenRTB specification is updated approximately once a month if there are non-breaking improvements to be released such as new fields, objects, or values in enumerated lists. Errata, such as clarifications or corrections to descriptions not materially impacting the specification itself, are also addressed during monthly updates. See Errata.
Release branches are created for each monthly release and the history of these can be reviewed on GitHub. The master branch for the repository will always reflect the most recent release, whereas ongoing development work occurs in the 'develop' branch.
This versioning policy is a break from historical practice for OpenRTB 2.x. In versions of OpenRTB prior to 2.6, major version numbers represent breaking changes and minor version numbers represent non-breaking changes.
For more information, or to get involved, please email support@iabtechlab.com.
The IAB Technology Laboratory is a nonprofit research and development consortium charged with producing and helping companies implement global industry technical standards and solutions. The goal of the Tech Lab is to reduce friction associated with the digital advertising and marketing supply chain while contributing to the safe growth of an industry. The IAB Tech Lab spearheads the development of technical standards, creates and maintains a code library to assist in rapid, cost-effective implementation of IAB standards, and establishes a test platform for companies to evaluate the compatibility of their technology solutions with IAB standards, which for 18 years have been the foundation for interoperability and profitable growth in the digital advertising supply chain.
Learn more about IAB Tech Lab here: https://www.iabtechlab.com/
OpenRTB Working Group members provide contributions to this repository. Participants in the Programmatic Supply Working group must be members of IAB Tech Lab. Technical Governance and code commits for the project are provided by the IAB Tech Lab Programmatic Supply Chain Commit Group.
Learn more about how to submit changes in our working group: So, You'd Like to Propose a Change...
OpenRTB Specification the IAB Tech Lab is licensed under a Creative Commons Attribution 3.0 License. To view a copy of this license, visit creativecommons.org/licenses/by/3.0/ or write to Creative Commons, 171 Second Street, Suite 300, San Francisco, CA 94105, USA.
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