【71-75】
The（71）is a general description of the architecture of a workflow management system used by the WFMC， in which the main components and the associated interfaces are summarized.The workflow enactment service is the heart of a workflow system which consists of several（72）.In a workflow system， a process is specified using the process definition tool.Usually， processes are defined in terms of a（73）， which consists of（74）indicated using a circle， and（75）shown as a rectangle.These two components can be linked by means of a directed arc.
