A data structure is populated with status information, which has a first state that is any one of a plurality of states. Flags stored in the data structure are associated with the status information, where a set flag indicates that update data are available. Update data are available when status information has changed from the first state to any other of the states. Update data is determined based on the flags, where the update data correspond to status information that has changed from the first state to any other of the plurality of states. The update data is retrieved at a central source. The flags associated with the set of update data are reset, whereupon the flags indicate there are no available update data. A determination is made regarding portions of the update data to send to presentation components, and the portions are communicated to the presentation components.