The files symbols.sym and the symbol images are taken from an arcticle 
by Peter Freimuth - MapMedia GmbH. It is based on a project of 
Universitt Hannover  Institut fr Landschaftspflege und Naturschutz  
led by Roland Hachmann, and a report by Karsten Hoffmann.

The docs are available at
http://www.mapmedia.de/fileadmin/user_upload/dokumente/umn_signaturen_howto/index.html#beispielkomplex
and
http://www.mapmedia.de/fileadmin/user_upload/dokumente/umn_signaturen_howto/Praktikumsarbeit.zip

Download symbols and samples for map files
http://www.mapmedia.de/fileadmin/user_upload/dokumente/umn_signaturen_howto/vortrag_demo.zip