As explained in Chapter Extension 5, Database Design, in order to represent a many-to-many relationship using the relational model, it is necessary to create an intersection table. If that table has nonkey data, that data represents something particular about the combination of one entity with another. For example, the relationship between Students and Classes is many-to-many, and Grade is an intersection table that represents the combination of a particular student with a particular class. What is the analog to the intersection table in the relationship between business processes and information systems? Where, for example, in the figure in QCE18-3 is there evidence of a particular IS application being used in a process?