Slip: Definition of STOCK and FLOW must be exchanged. (#85)

lecture/5-olap/2-cube-olap.tex

@@ -418,12 +418,12 @@ \section{Data Warehouse Modeling: Data Cube and OLAP}
 			      \item Next to name and value range.
 		      \end{itemize}
 		\item \textbf{Defines the set of aggregation operations that can be executed on a measure (a fact).}
-		\item \textbf{\color{airforceblue}FLOW:} Measure at a specific point in time.
+		\item \textbf{\color{airforceblue}STOCK:} Measure at a specific point in time.
 		      \begin{itemize}
 			      \item Aggregated as desired.
 			      \item E.g. sales turnover, quantity of an item ordered per day.
 		      \end{itemize}
-		\item \textbf{\color{airforceblue}STOCK:} Measure over a period of time.
+		\item \textbf{\color{airforceblue}FLOW:} Measure over a period of time.
 		      \begin{itemize}
 			      \item Aggregated as desired, but temporal aggregation not permitted.
 			      \item E.g. total stock and total inventory. Yet, summarization of article stock over multiple days makes no sense!