DDD: Aggregation root!?

??????????????????????????????????????????????? OOD ????? DDD (Domain-Driven Development) ???????? Aggregation root ?????????????? Web shopping domain ?????? ????????????? domain diagram ????? ??????????????? Object ?????????? Low Coupling & High Cohesion ??? SoC ??????????????? work ?????????????? case ??????????????????????????????????? ???????????????????????? Merchant ??? Product ??????????????????????????? load Product ??? database ?????????????? object »