Why schema free is important for RServe? Because we plan to support many business type. Different business type usually come with different data on reservation. We want to support RServe user to able embed custom data in their reservation data
Basically, RServe is using the schema-less MongoDB as a form of multi-tenancy.
Another reason for using document databases is to (try to) avoid the complexity of such schemas:
Original title and link: MongoDB at RServe (NoSQL databases © myNoSQL)