A method and federated publish/subscribe system for data transfer in the federated publish/subscribe system. The federated publish/subscribe system includes a processor, a first message broker, and a second message broker. The second message broker transmits, via the processor, a message A to a first subscribing application and a message (A+Δ) to a second subscribing application. The message (A+Δ) differs from the message A by changes Δ. The first subscribing application and the second subscribing application are different subscribing applications. Prior to the transmitting by the second message broker, the second message broker receives, from the first message broker via the processor, either (i) a message (A, Δ) comprising the message A and the changes Δ or (ii) the message A and a message Δ comprising the changes Δ.