An embodiment may involve defining a process by first and second process design applications, wherein the process includes a set of stages; receiving, by a process visualization application, a reference to a parent entry and a definition of the process referencing the parent entry; based on the parent entry, identifying a first transformer class associated with the first process design application and a second transformer class associated with the second process design application, wherein the individual classes contain executable functions; converting an output of the first and second process design applications in a first configuration into a second configuration based on a first transformer class associated with the first process design application and a second transformer class associated with the second process design application, wherein the second configuration is accessible to the process visualization application; generating a display of the process in a hierarchical arrangement, wherein the hierarchical arrangement reflects the sets of stages and the associated activities.