GROUP COMPOSITING ALGORITHMS FOR PRESENCE

Systems and methods presented herein construct groups and determine the presence for the groups. The groups can be constructed based on business logic. A set of components can model a group from the business logic, can establish a membership for the group, can determine one or more rules that govern presence determination for the membership, and can provide the group model, membership information, and the one or more rules to a rules engine. The rules engine can evaluate presence within the group model based on the membership and the one or more rules. The group presence can then be provided to one or more entities, applications, or workflows that subscribe to the rules engine for the group presence.