1. An apparatus for processing one or more events for use with a complex event processing system comprising a server computer system and a client application executable on a client computer system which is operable to generate the one or more events, the apparatus comprising: a rule management component configured to analyse content of the one or more events and to assign a plurality of attributes to associated event processing logic, wherein a first attribute is associated with event processing logic that is operable to be applied at the client computer system and a second attribute is associated with event processing logic that is operable to be applied at a server computer system; and an event filter component executable on the client computer system and configured to: receive a first event at the client computer system, the first event including a first event name; determine, at the client computer system independently of the server computer system, based on the assigned attributes and the first event name, whether event processing logic associated with the first event is operable to be applied at the client computer system; based on determining that event processing logic associated with the first event is operable to be applied at the client computer system: determining whether the first event meets criteria described by the event processing logic; and based on determining that the first event meets criteria described by the event processing logic, executing the event processing logic that is operable to be applied at the client computer system to update the first event and forwarding the updated first event to the server computer system; and based on determining that event processing logic associated with the first event is not operable to be applied at the client computer system: determine, at the client computer system, based on the assigned attributes and the first event name, whether event processing logic associated with the first event is operable to be applied at the server computer system; and forward the first event to the server computer system based on the event processing logic associated with the first event being determined to be operable to be applied at the server computer system.