Apartment¶
An apartment (in American English) or flat (in British English) is a self-contained housing unit (a type of residential real estate) that occupies only part of a building (source: Wikipedia, the free encyclopedia, see http://en.wikipedia.org/wiki/Apartment).
Diagram¶

Formalization for Apartment¶
| Property | Constraint |
|---|---|
| subClassOf | Accommodation |