# Katalogverweis
BO4E component · 3 fields · 3 uses in check identifiers and events
## Fields
| Field | Type | Description |
|---|---|---|
| `katalognummer` | string | Catalog number |
| `zeilennummer` | string | Line number |
| `versionsnummer` | string | Version number |
| Structure (BO4E) | Description | Format |
|---|---|---|
| [katalognummer](/en/bo4e/202610/com/Katalogverweis#katalognummer) | Catalog number | string |
| [zeilennummer](/en/bo4e/202610/com/Katalogverweis#zeilennummer) | Line number | string |
| [versionsnummer](/en/bo4e/202610/com/Katalogverweis#versionsnummer) | Version number | string |
## Used in
### katalognummer
1 use(s) in the message types QUOTES.
| Used in | Type | Message type | Container |
|---|---|---|---|
| [PI_15001](/schnittstellen/202610/pruefi/QUOTES/PI_15001) | Prüfi | QUOTES | stammdaten › ANGEBOT › positionsdaten › verweisKatalognummer |
### zeilennummer
1 use(s) in the message types QUOTES.
| Used in | Type | Message type | Container |
|---|---|---|---|
| [PI_15001](/schnittstellen/202610/pruefi/QUOTES/PI_15001) | Prüfi | QUOTES | stammdaten › ANGEBOT › positionsdaten › verweisKatalognummer |
### versionsnummer
1 use(s) in the message types QUOTES.
| Used in | Type | Message type | Container |
|---|---|---|---|
| [PI_15001](/schnittstellen/202610/pruefi/QUOTES/PI_15001) | Prüfi | QUOTES | stammdaten › ANGEBOT › positionsdaten › verweisKatalognummer |
A **\*** after a field name marks a **mandatory field**; the BO4E schema lists it under `required`.
This overview is generated from the `$ref` graph across all Prüfi and event specifications. It answers the question of which messages a field actually occurs in — information that was not available in the previous documentation.