# BT-12 — Contract reference

> https://billhorse.com/en/terms/bt-12/

Identifier of the underlying contract (e.g. the buyer's framework or contract number).

## Where does it live in the XML?

- UBL: `cac:ContractDocumentReference/cbc:ID`
- CII: `rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:ContractReferencedDocument/ram:IssuerAssignedID`