Storing entities and relationships within entities

While it might seem like a good idea to define entities as properties inside other entities, this can quickly get out of control. Remember that each property on an entity should directly relate to that entity, otherwise you will find your nodes getting big and queries becoming limited.

For example, it might be tempting to store things, such as drivers and cars, together, storing attributes about the car as properties on the driver. Querying will become difficult to solve if new requirements to query properties about the cars are introduced. But querying will become near impossible once the system needs to account for drivers with multiple cars. The bottom line is that if you need to store properties for an entity, it should have its own node and there should be a relationship to it.