Graph entities

Entity	Description
Shipment	Central entity representing a freight movement. All other entities connect to it.
Identifier	A reference number (HBL, booking, PO, invoice, container, etc.) that links to a shipment.
Party	An organization — carrier, forwarder, shipper, consignee, customs broker — with a specific role.
Contact	An individual person associated with a party.
Leg	A route segment (ocean, truck, rail, air) with origin, destination, and schedule.
Container	A physical shipping container with number, type, and seal.
Commodity	Goods being shipped, with HS codes, weight, and dimensions.
Charge	A financial line item with amount, currency, and billed-by/billed-to parties.
Event	A milestone (booked, departed, arrived, cleared, delivered) with timestamp and status.
Location	A port, airport, city, or facility with UN/LOCODE.
Email / Document	Source records that maintain full provenance for every entity in the graph.