EN/CityGML-Tutorial/Extras.md

@@ -42,7 +42,7 @@ The output CityGML file will contain the schematic attribute for year of constru
 
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->The difference between using database joiner and feature merger (CSV as a reader), is that CSV reader with cache all the data from the CSV file on your local machine. This is not good if you are working with a large dataset. With a database joiner, the transformer will read your database on the run and hence will not cache any data on your local machine. This saves time, memory and disk space.
+>The difference between using database joiner and feature merger (CSV as a reader), is that CSV reader with cache all the data from the CSV file on your local machine. This is not a good practice particularly when working with a large dataset. With a database joiner, the transformer will read your database on fly and hence will not cache any data on your local machine. This saves time, memory and disk space.
 
 ## Adding a generic attribute to the CityGML dataset (Generic Attribute: Specific Space Heating Demand)