Omit default topic name type

[GoogleCodeExporter]

An export from Maiana:

topic
  -  <http://psi.topicmaps.org/iso13250/model/topic-name> : "2004-09-25 06:00:00 : IED FOUND/CLEARED  Other";
.

The name type <http://psi.topicmaps.org/iso13250/model/topic-name> is useless 
since 

topic 
  - "2004-09-25 06:00:00 : IED FOUND/CLEARED  Other";
.

yields the same result

Original issue reported on code.google.com by lars.he...@gmail.com on 28 Jan 2011 at 10:14