Document
↔ Mongo Row of Collection Table, to contain data about entity
aka Documents, Mongo-Doc, Mongo-Docs
References
Collection
↔ Mongo Table of DocumentsDocument-based DB
↔ to store data as collection of Documents, as NoSQL field-value pair data structuresNo Schema
↔ Mongo Docs require no data schema - flexible, can have different number & type of fields, can change fields at any time