1 · MongoDB · GLOSSARY Glossary: What Are the Names of These Things? In theory In MongoDB EXAMPLE Database database game_db BSON (Binary JSON) Binary Format for Storing Documents Ratio collection (Collection) item_configs Motorcade document one item Attribute field base_price Primary key _id "sword_dawn" Table Layout $jsonSchema (if specified) required, bsonType, enum Relationship Building $lookup Aggregation for a left outer join Sampling / Projection $match / $project Filtering Rows and Selecting the Desired Fields Index Index (B-Tree / WiredTiger) A document is the boundary between shared data and an atomic record.