OpenRTB and AdCOM changelog
OpenRTB 2.6 changes through dated snapshots, and AdCOM changes the enumerated lists they point to. This page lists both in date order. Follow it with the RSS feed.
Ad format signaling update: new plcmt values 5 to 9 for CTV formats such as pause and overlay ads, new placement positions, reworded playback methods, and new creative attributes.
Programming liveness: Content.realtime and Content.firstbroadcast added, Content.livestream redefined, and the AUCTION_PRICE macro description updated.
The same liveness fields added to the AdCOM Content object, with the livestream description updated to match OpenRTB.
Data.cids added for extended content identifiers, replacing a community extension, and Content.genres retyped from integers to strings.
Content.gtax and Content.genres added for genre taxonomies, Content Taxonomy 3.1 added to the category taxonomy list, and deprecated field descriptions removed.
EID.inserter, EID.matcher, and EID.mm added so an identifier's origin is visible, with guidance on ID bridging.
List: ID Match Methods added for the new EID.mm field.
Video.poddedupe added so sellers can say how ads in a pod are deduplicated.
List: Pod Deduplication Settings added for Video.poddedupe.
BidRequest.acat for allowed categories, duration floors (DurFloors) on video, audio, and deals, and Deal.guar and Deal.mincpmpersec, with floor guidance.
Video.plcmt replaces the deprecated Video.placement, Imp.refresh with Refresh and RefSettings describes ad refresh, and the AUCTION_IMP_TS macro arrives.
List: Plcmt Subtypes - Video added for plcmt, Content Taxonomy 3.0 added, and DOOH venue taxonomies replace the deprecated venue types list.
The DOOH object and Imp.qty for digital out-of-home, GPP in regs.gpp and regs.gpp_sid, and inventorypartnerdomain moved out of ext.
The first release in the openrtb2.x repository, republishing the April 2022 OpenRTB 2.6 text with no changes.
CTV ad pods, structured user agents, rewarded and SSAI signals, cattax, the AUCTION_MIN_TO_WIN macro, GDPR consent and the supply chain promoted out of ext, and long-deprecated fields removed.
Header bidding support through Source, the Metric object, billing and loss notices, and the AUCTION_LOSS macro.
Earlier versions
OpenRTB 2.0 (2012) through 2.4 and OpenRTB 3.0 are listed with their changes on the specification versions page. To see every field that changed between two versions, use the version diff tool.