@startuml

scale 3

Object "<u>:Register" as R
Object "<u>:Sale" as S
Object "<u>:SalesLineItem" as SLI <<collection>>
Object "<u>:ProductSpecification" as PS

R -r- S : > total := getTotal()
S -r- "*" SLI : > 1*: st = getSubTotal()
SLI -d- PS : 1.1: pr := getPrice()

note top of SLI:  Sale¿¡ ¿¬°áµÈ ¸ðµç\nSalesLineItem¿¡ ´ëÇÏ¿©\n¹Ýº¹ÇØ¾ß ÇÔ



@enduml