add year

Author: jmckenna

en/mapfile/symbology/construction.txt

@@ -23,7 +23,7 @@ Abstract
 This Document refers to the syntax of *map* and *symbol* files for
 MapServer 6.  The first version of the document was based on the
 results of a project carried out at the University of Hannover,
-Institute of Landscape and Nature Conservation. It was initiated by
+Institute of Landscape and Nature Conservation, in 2004. It was initiated by
 Mr. Dipl. Ing. Roland Hachmann. Parts have been taken from a study
 carried through by Karsten Hoffmann, student of Geography and
 Cartography at the FU Berlin. In the context of a hands-on training in
@@ -35,9 +35,9 @@ The document has been heavily revised for MapServer  6.
 
 .. tip::
 
-   All of the mapfiles, symbol files, reports, etc. are still available for download 
-   (you will have to update them for recent MapServer versions, but they are still 
-   very helpful): 1) `mapfiles & symbol files <https://download.osgeo.org/mapserver/docs/vortrag_demo.zip>`__, 
+   All of the mapfiles, symbol files, reports, etc. originally used to produce this document 
+   are still available for download (you will have to update them for recent MapServer 
+   versions, but they are still very helpful): 1) `mapfiles & symbol files <https://download.osgeo.org/mapserver/docs/vortrag_demo.zip>`__, 
    2) `research report <https://download.osgeo.org/mapserver/docs/Praktikumsarbeit-2004.pdf>`__ (in German), 
    and 3) `future improvements <https://download.osgeo.org/mapserver/docs/DiskussionsPaper-UMNGraphikKernel.pdf>`__ (in German).