GroupsThe second tier of the hierarchy that typically fall within menus such as Appetizers, Salads, Sandwiches, Desserts.
ItemsIndividual offerings that will fall into groups and subgroups, such as Mozzarella Sticks in Appetizers.
MenusThe highest level of the hierarchy and typically map out the different categories of offerings you serve.
SubgroupsSmaller groups within a menu group to help break things down further like Wines by the Glass, Wines by the Bottle.