In the Introduction to Graph Query Language post we were looking at the circular relationship between a Customer and Tender (mode of payment) as used in Transactions To recap: Customer may use a Tender (mode of payment e.g. Credit Card, Gift Card etc); A Tender (mode of payment) can be used by Customer Here the the relationship is bi-directional with different context. Note that Customer may use several different Tenders in different transactions e.g. The Customer may use a Gift Card for ...