Information

An information model for the entire business helps establish a common understanding of concepts and terminology.

I usually draw information models using UML:

I also catalog information entities with details about content (properties, or attributes) and relationships.

Entity	Description	Content	Relationships
Hotel	The business – or enterprise.	Name.	Rooms, bookings, and guests.
Room	Rooms for rent.	Number.	Stock.
Stock	Contents of the minibar.	Name, Price.
Booking	Reservations.	Arrival and departure date.	Charges.
Charges	Restaurant bills and purchases from the room’s minibar.	Date, amount.
Guest	Guests.	Name.	Bookings, charges.