Modification of the delimind script to insert a hierarchical structure of subtags when tags are contained one in the other, and connecting together equivalent branches. Shameless self promotion (but is a new blog!)
A. Shakya, H. Takeda, I. Ohmukai, and V. Wuwongse. The Semantic Web - ASWC 2006 Workshops Proceedings, page 55-62. Beijing, China, Jilin University Press, (September 2006)