which data is made available to a plurality of entities for example the bus may include a message bus a data transfer bus a notification bus an enterprise service bus etc in addition in one embodiment a plurality of subscribers may be associated with the bus in another embodiment the plurality of subscribers may include one or more applications within the multi tenant on demand database system for example the plurality of subscribers may include the first application as well as a plurality of additional applications other than the first application in another example the plurality of subscribers may include one or more entities situated between and separate from the bus and one or more applications that manage the transfer of events between the bus and the applications further in one embodiment the plurality of subscribers may be in communication with the bus for example one or more of the plurality of subscribers may listen to the bus e g in order to detect events published to the bus etc in another embodiment one or more subscribers listening to the bus may retrieve the published application independent format event for example one or more of the subscribers may detect the published event and may consume the event by registering with the bus in yet another embodiment the bus may filter one or more events and may only deliver events to one or more predetermined subscribers further in one embodiment the published application independent format event may be retrieved by one or more of the subscribers by sending the event to the subscribers from the bus in another embodiment one or more of the subscribers may retrieve the published.