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Fields & identifiers

BT number (business term)

A BT number identifies a single data field in EN 16931 — BT-1 is the invoice number, BT-10 the buyer reference. Validator error messages almost always cite the BT number rather than the field name used in your own system.

Also:
BT · Business Term · BT-10 · BT-1
Reviewed on 2026-08-26.

There is no long-form article for this term yet. The definition above is the complete entry; the related terms lead onwards.