==== Vocabulary ====
**Concepts:** 

  * //balance// - a customer's account balance
  * //registerDate// - the date of registering the client as a customer
  * //profile// - one of the possible customer status
  * //product// - products/services offered by the bank

**Relations:**

  * //balance// -> //profile//
  * //registerDate// -> //profile//
  * //profile// -> //profile// 
  * //profile// -> //product//
  * //product// -> //product//