Abstract: A data processing system includes a transaction bus, a console application in communication with the transaction bus, and a view predictor subsystem in communication with the transaction bus. A call for visual information is received at the transaction bus. Prior to returning a result to the user application in response to the call: a likelihood that the visual information will be viewable within a viewport of a user application is determined by the view predictor subsystem, the console application provides to the transaction bus a set of potential sources of the visual information, the transaction bus converts associated data from the potential sources into a common form of measurement using the likelihood, and the transaction bus selects one of the potential sources of the visual information to be the result based on the data converted into the common form of measurement. The result is returned to the user application.

Abstract: A data processing system includes a transaction bus, a console application in communication with the transaction bus, and a view predictor subsystem in communication with the transaction bus. A call for visual information to be provided to the user application is received at the transaction bus from a user application executing on a client device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for receiving a notification of an ad space, the ad space being for presentation in a user interface of an application executing on a client device, sending, to the client device, instructions configured to be executed by the client device for determining view-ability data of the ad space, the view-ability data comprising whether the ad space is within a viewport of the user interface, receiving, from the client device, the view-ability data as determined by the instructions at a first time instance, calculating a predicted view-ability that the ad space is positioned within the viewport at a second time instance after the first time instance, and sending, to a plurality of bidders, a bid request for bidding on an auction of the ad space, the bid request comprising the predicted view-ability.