Context-based call routing is provided in a unified communication system by enabling subscribers to define a routing document, which is published by the communication system to callers who subscribe to a presence of the called party. Through publication of the context-based routing information, callers are enabled to make selections between call destination options as defined by the caller and provide a subject for the requested call. The call is then routed by the system according to the caller selection allowing efficient facilitation of the communication between the caller and the called party or their designees.