---
title: "Quittio\\Core\\Data\\Extensions – API-Referenz"
description: "The public classes in Quittio\\Core\\Data\\Extensions."
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> Index of every page on this site: [llms.txt](https://quittio.dev/llms.txt)

[API reference](https://quittio.dev/docs/api)

# Quittio\\Core\\Data\\Extensions

## quittio/core \#

### [Quittio\\Core\\Data\\Extensions](https://quittio.dev/docs/api/Quittio/Core/Data/Extensions)

- [`ExtendedData`](https://quittio.dev/docs/api/Quittio/Core/Data/Extensions/ExtendedData)Document level data that exists only in the Factur-X/ZUGFeRD EXTENDED profile. The selection covers the practically relevant elements.
- [`ExtendedParty`](https://quittio.dev/docs/api/Quittio/Core/Data/Extensions/ExtendedParty)Additional trade party of profile EXTENDED (invoicer, invoicee, ultimate customer, ship-from, line ship-to).
- [`IncludedProduct`](https://quittio.dev/docs/api/Quittio/Core/Data/Extensions/IncludedProduct)Component of a set or bundle (profile EXTENDED).
- [`Installment`](https://quittio.dev/docs/api/Quittio/Core/Data/Extensions/Installment)One of several payment terms with its own due date (profile EXTENDED), e.g. instalments.
- [`LineExtendedData`](https://quittio.dev/docs/api/Quittio/Core/Data/Extensions/LineExtendedData)Line level data that exists only in the Factur-X/ZUGFeRD EXTENDED profile.
- [`ThirdPartyPayment`](https://quittio.dev/docs/api/Quittio/Core/Data/Extensions/ThirdPartyPayment)Amount collected on behalf of a third party (XRechnung extension, group BG-DEX-09). It is added to the amount due (BR-DEX-09).
- [`XRechnungExtensionData`](https://quittio.dev/docs/api/Quittio/Core/Data/Extensions/XRechnungExtensionData)Data of the XRechnung extension. Sub invoice lines are modelled via InvoiceLine::$subLines.

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