Items The Items element defines the items on the BA diagram and the relations between them. Item (BusinessApplication)Unlike Form and BusinessRecord, the Item element of BusinessApplication does not modify the behavior of an existing item, it defines a new item, with a new name, inheriting from a default item.BasicItemThe BasicItem element defines a new item, with a new name. It does not modify the behavior of an existing item.RelationThe Relation element defines a BA diagram relation.