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As described in the TypoScript syntax introduction
TypoScript templates are converted into a multidimensional PHP array.
You can view this in the TypoScript object browser. Top level
objects are located on the top level. Top level objects are for
Some have an explicit object type, such as
config, some may be filled arbitrarily by extensions.
Some of these are already initialized by TYPO3, such as
plugin, some must be initialized explicitly, such as
Top-level object type
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