Responsive to transactional middleware for a particular domain processing a particular transaction instance at a processing point specified in transaction telemetry standards as a tracking point along a flow of the particular transaction, a facility of the middleware accesses correlation data for the particular transaction instance in the particular domain and extracts application level context information about the particular transaction instance from the particular domain, wherein the transaction telemetry standards specify a same set of standards for application by each separate transactional middleware instance of a composite application. At least one facility of the transactional middleware creates a tracking event comprising the correlation data and the application level context information formatted into an event structure defined by the transaction tracking standards. At least one facility of the transactional middleware surfaces the tracking event in compliance with the transaction telemetry standards.