This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
For some time it's possible to define the layout of the various content areas in the Page module using so called Backend Layouts. These are usually stored in records (which an easy wizard to create them), but this makes it harder to migrate them between installations.
In TYPO3 CMS 6.2 a feature was introduced that allows extensions to have a so called dataprovider for backend layouts.
Georg Ringer made an example https://github.com/georgringer/belayout_fileprovider for such an extension. In this sitepackage is a very simplified version which assumes that the files are in a specific location.
The class is located in Classes/Provider/FileProvider.php . The provider needs to be registerd with:
$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['BackendLayoutDataProvider']['sitepackage'] = 'jigal\\sitepackage\\Provider\\FileProvider';
The last part between square brackets contains the prefix that will be
used in the backend layout identifier. These have the naming format
<prefix>__<backendLayoutName> (with 2 underscores!).
For the provider in this extension the following locations and conventions are used:
- backend layout: Resources/Private/BackendLayouts/ *<name>* .ts
- title: Resources/Private/Language/BackendLayouts.xlf ; id = <name>
- icon: Resources/Public/Backend/Images/ *<name>* . *png|gif*