# Code list

A predefined set of allowed codes/values (e.g., VAT category, payment means).

## Definition

A predefined set of allowed codes/values (e.g., VAT category, payment means).

## Explanation

Used to standardize meanings across systems.

Validation often checks that a code is allowed for the selected profile/standard.

## Related resources

- [Code lists](/resources/code-lists)

## Related terms

- [Validation](/resources/glossary/validation): Process of checking an e-invoice against syntax rules and business rules.
- [Tax category](/resources/glossary/tax-category): Classification of tax treatment (e.g., standard, exempt, zero-rated).
- [Payment means](/resources/glossary/payment-means): Code describing how an invoice is paid (e.g., bank transfer, card, cash).