Defining a property information structure

A key part of what Book Someplace needs to store is information regarding properties available for booking. A large part of what goes into the property structure has already been defined as Location, which gives us the customer's address and geospatial coordinates. In addition, the property should be identified as a type and needs to define the local currency, description, and photos. Also, the property might pertain to a brand that is part of a larger organization. An example of this is Accor S.A., a French hotel chain that includes well-known subsidiaries such as Ibis, Red Roof Inn, Motel 6, Novotel, Mercure, Sofitel, and Fairmont, among others. Room information is defined as a separate structure. 

Here is our first attempt at a structure pertaining to property information:

PropInfo = {
    "type"        : <propertyType>,
    "chain"       : <chain>,
    "photos"      : <stored using GridFS...