Producer object
The Producer object identifies who made the content, as opposed to who sells the ad space around it. It sits at Content.producer and matters most for syndicated content, where one studio's video or one newsroom's article runs across many publishers.
How it is used
A buyer can follow a producer such as a film studio across every site and app that carries its programs, or avoid it, regardless of which publisher is selling. The fields mirror Publisher: an ID, a name, a domain, and categories with their taxonomy.
Fields
Where it sits
Contained in: Content.
All objects
The field reference index lists every OpenRTB 2.x object.