Formated enumeration

Hi, it's me again ;-)

I need to emulate the structure of a document. To do this I use the 
enumeration environment. The "chapters" are formated well. But if I try 
to emulate a section the result doesn't look like the table of contents. 
This is because the 2.2 doesn't start under the "G" but between the 
number and the "G".

\begin{enumeration}
\item Einleitung
\item Grundlagen
	\begin{itemize}
	\item[2.2] Transaktionen
	\end{itemize}
...
\end{enumerate}

Do you know what I mean?

regards
Marco


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