Notes for Sale:
- A SALE may be characterised by a number of things,
including: sales type, volume, value
- Representing SALE as a CLASS in this manner, is
equivalent in meaning to modelling it as a 4-ary
Relationship between two Legal-Entities and two
Goods, Services, or Quantities of Money exchanged.
This approach was chosen becauses it seemed simpler.
It is an open question as to whether it makes much
difference.
Slots on class Sale:
- Arity: 1
- Documentation:
An agreement between two
LEGAL ENTITIES to exchange one Good-Service-or-Money for
another Good-Service-or-Money.
- Domain-Of: Actual-Customer, Product-Sold, Sale-Price, Sale-Vendor
- Instance-Of: Class, Relation, Set
- Subclass-Of: Eo-Entity, Individual, Individual-Thing, Thing
Slots on instances of Sale:
- Actual-Customer:
- Minimum-Slot-Cardinality: 0
- Slot-Cardinality: 1
- Product-Sold:
- Minimum-Slot-Cardinality: 0
- Sale-Price:
- Minimum-Slot-Cardinality: 0
- Sale-Vendor:
- Minimum-Slot-Cardinality: 0
- Slot-Cardinality: 1