TYPO3 v7 has reached its end-of-life November 30th, 2018 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.

There is no further ELTS support. It is recommended that you upgrade your project and use a supported version of TYPO3.


TYPO3 offers an XML format, T3DataStructure, which defines a hierarchical data structure. In itself the data structure definition doesn't do much - it is only a back bone for higher level applications which can add their own configuration inside.

Such applications can be:

  • FlexForms - a TCEform type which will allow users to build information hierarchies (in XML) according to the Data Structure. In this sense the Data Structure is like a DTD (Document Type Definition) for the backend which can render a dynamic form based on the Data Structure;

  • TemplaVoila! - an extension which uses the Data Structure as backbone for mapping template HTML to data.

This documentation of a data structure will document the general aspects of the XML format and leave the details about FlexForms and TemplaVoila to be documented elsewhere.

Some other facts about Data Structures (DS):

  • A Data Structure is defined in XML with the document tag named "<T3DataStructure>"

  • The XML format generally complies with what can be converted into a PHP array by \TYPO3\CMS\Core\Utility\GeneralUtility::xml2array() - thus it directly reflects how a multidimensional PHP array is constructed.

  • A Data Structure can be arranged in a set of "sheets". The purpose of sheets will depend on the application. Basically sheets are like a one-dimensional internal categorization of Data Structures.

  • Parsing a Data Structure into a PHP array is incredibly easy - just pass it to \TYPO3\CMS\Core\Utility\GeneralUtility::xml2array() (see the Parsing a Data Structure section).

  • "DS" is sometimes used as short for Data Structure