---
title: "Deprecation: #78581 - Flex form related parsing"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-78581"
source: "Changelog/8.5/Deprecation-78581-FlexFormRelatedParsing.rst"
typo3-version: "8.5"
typo3-major: 8
type: "deprecation"
issue: 78581
forge: "https://forge.typo3.org/issues/78581"
tags: ["PHP-API", "FlexForm", "Backend"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Deprecation: #78581 - Flex form related parsing {#deprecation-78581}

See [forge#78581](https://forge.typo3.org/issues/78581)

## Description {#description}

Three flex form data structure related parsing methods have been deprecated:

-   `BackendUtility::getFlexFormDS()`
-   `GeneralUtility::resolveSheetDefInDS()`
-   `GeneralUtility::resolveAllSheetsInDS()`

## Impact {#impact}

Calling those PHP methods will trigger a deprecation log entry.

## Affected Installations {#affected-installations}

Extensions calling one of the above methods.

## Migration {#migration}

`BackendUtility::getFlexFormDS()` has been refactored to a combination of two methods
`FlexFormTools->getDataStructureIdentifier()` and `FlexFormTools->parseDataStructureByIdentifier()`.
The two methods are heavily documented and the combination works in many cases just as before. Read the method
comments for a detailed description of their purpose.

Warning: The hook `getFlexFormDSClass` within `BackendUtility::getFlexFormDS()` is no longer called
by the core. Please refer to the according "Breaking" document for details on this topic.