relation module CDShop

// Customers
$$ Customer
@@ CustomerName
## Customer has CustomerName

// Suppliers
$$ Supplier
@@ SupplierName
## Supplier has SupplierName

// CD's 
$$ CD
@@ CDName
@@ Price
@@ Artist
## CD has CDName
## CD is of Artist
## CD has Price
## CD can be supplied by Supplier

// Requests from customers
$$ Request
@@ RequestedQuantity
## Customer makes Request on Date
## Request contains RequestedQuantity copies of CD 

// Quotes for customers
$$ Quote
@@ QuotePrice
@@ QuoteQuantity
@@ Date
## Quote is given in response to Request
## Quote includes QuoteQuantity copies of CD
## Quote has QuotePrice 					
## Quote is opened on Date

$$ RejectedQuote [Quote]
## RejectedQuote is rejected on Date

$$ AcceptedQuote [Quote]
## AcceptedQuote is accepted on Date
## invoice is sent for AcceptedQuote
## products are shipped for AcceptedQuote

// Orders for suppliers
$$ Order
## Order is placed at Supplier
## Order contains OrderItem
## Order is sent to supplier on Date
## Order is shipped on Date
## invoice was received for Order on Date

$$ OrderItem
@@ OrderedQuantity
## OrderItem = OrderedQuantity copies of CD are intended for Quote 
## OrderItem is deliverable

// Payments
$$ SupplierPayment
@@ OrderPrice
## SupplierPayment = OrderPrice is paid to Supplier for Order
## SupplierPayment is sent on Date
## SupplierPayment is received on Date

$$ CustomerPayment
@@ FinalQuotePrice
## CustomerPayment = Customer pays FinalQuotePrice for Quote
## CustomerPayment is sent on Date
## CustomerPayment is received on Date