Implementing Vertex with QAD EE > Overview > Business Relations
  
Business Relations
All addresses are recorded as business relations in QAD EE. Business relations are then attached to entities, customers, suppliers, and end users, and provide a a single point of entry for address data that you can then use in multiple places in the system.
You can use the same business relation for a customer who is also a supplier. If this were the case in previous software versions, you would have had to maintain addresses in two places—Customer Maintenance and Supplier Maintenance. In QAD EE, you create a single business relation to record the address, and then create customer and supplier records that both reference the business relation.
Note: It is possible to define business relations by domain by selecting the Domain Restricted field in Business Relation Create. A restricted business relation can only be viewed, modified, and reported on in the domain in which it was created.