Name: Topic SubTopics
Type: requirement
Invented on: 2010-05-14
Invented by: flonatel
Description: Each topic \textbf{might} have one ore more sub-topics.
Note: The subtopic must point to another topic. The subtopic is
 included in the next hierarchy level with the subtopic's name as the
 headline - and possible sub-sub-topics as sub-sections.
Owner: development
Status: finished
Priority: development:10
Topic: Topic
