Abstract: Described herein is a task modeling system configured to process a task model that is described by a task modeling notation. Further, the task modeling notation may provide for attaching the task model to a user interface description. The system comprises a computer readable storage medium containing program code, wherein the program code is executable by a processor to (a) generate a task tree from a task model, wherein the task tree comprises a plurality of interconnected task nodes, wherein the task model is described by a task modeling notation, (b) attach the task tree to a user interface description, (c) coordinate a state of the task tree with a state of the user interface, and (d) cause the state of the user interface to be updated as indicated by the state of the task tree, wherein the state of the user interface is updated by updating a graphical display of the user interface.