[Typo3-dev] Make configuration simple

[dan frost]

IMH-Knowledge... this is what TYPO3 needs. If not 
XML+DTD then a similar thing

> 
> and IMHO a BIIIIG plus --> XML+DTD does not only unravel unused or made-up fields but it offers the editing tools (= backend GUI) the possibility to _LIST the available fields!!_ This means - no digging in TSref anymore as the user can clearly see what fields in the 
> current context are allowed! And even better - chances for a click'n'run backend just like the current Template Constants editor but on a defined language (XML)
> 
> just my 0,02 ¬
> 
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