# Dimension

A customer-definable tagging axis on postings — cost centre, project, contract, anything the chart of accounts cannot express — plus the native Scenario and Status axes, which every posting carries. Dimension values are data, not schema, so a new dimension needs no migration; cardinality is bounded by a tenant-configurable budget.

- Source: [Ledgerbook glossary](/glossary/)
- Related: [Accounting data layer](/glossary/accounting-data-layer/), [Ledger of record](/glossary/ledger-of-record/), [Bitemporal ledger](/glossary/bitemporal-ledger/)