er-diagram
ClutterStock – Entity Relationship Diagram
Relationships
From
To
Cardinality
Description
Location
Room
1 : N
One location has many rooms.
Room
Item
1 : N
One room contains many items.
Notes
Location
: Top-level place (e.g. "Home", "Garage", "Storage unit").
Room
: Room or zone within a location (e.g. "Garage – workbench", "Office").
Item
: Stored thing (electronics, parts, homelab gear, etc.).
