Web Services BusinessActivity (WS-BusinessActivity)
Web Services BusinessActivity (WS-BusinessActivity) provides the definition of the business activity coordination type that is to be used with the extensible coordination framework described in the WS-Coordination specification. The specification defines two specific agreement coordination protocols for the business activity coordination type: BusinessAgreementWithParticipantCompletion, and BusinessAgreementWithCoordinatorCompletion. Developers can use any or all of these protocols when building applications that require consistent agreement on the outcome of long-running distributed activities.
More information: WS-BusinessActivity page on the OASIS website
More on the general topic: Transaction Specifications