\section{System Design}
SOA

\subsection{DataModel}

Terms ? 
move to SKOS ?

RDF

\subsection{Architecture}

Makes use of mulitple Components of the established infrastructure (CLARIN ) \cite{Varadi2008}, \cite{Broeder2010}:

\begin{itemize}
\item Data Category REgistry, 
\item Relation Registry
\item Component Registry
\item Vocabulary Alignement Service (OpenSKOS)
\item SchemaParser
\end{itemize}
merging the pieces of information provided by those,
offering them semi-transaprently to the user (or application) on the consumption side.


\subsection{CMDI}

MDBrowser
MDService

\subsection{Query Language}
CQL?

\subsection{User Interface}

\subsubsection{Query Input}

\subsubsection{Columns}

\subsubsection{Summaries}

\subsubsection{Differential Views}
Visualize impact of given mapping in terms of covered dataset (number of matched records).

