Item classes are important components in AME as they uniquely identify a set attribute of a transaction, such as the line item cost, or line item cost centre. They can then be used in a rule to drive your business process for approvals using transaction values.
Item classes specify the data element that is part of a rule in building a hierarchy. These can be added to a transaction as needed to manage your business requirements.
An Item class can have multiple items within it to be used in the approval hierarchy building process. An Item can be used to identify a specific line or an identifying factor for that data element.