I am exploring how I can use Wikipedia\'s taxonomy information to extract Tags/Keywords from my content.
I found articles about DBPedia. DBpedia is a community effor
You can use Apache Stanbol for this process. Entityhub component of Apache Stanbol provides producing custom DBPedia indexes based on your needs. Then you can use Enhancer component to extract Places, Persons, Locations entities from your text.
Following mail thread may be helpful for you.
http://markmail.org/message/52266yl5ohijxiof
You can access running demos of Apache Stanbol from the following link:
http://dev.iks-project.eu/
You can also ask your further questions to stanbol-dev AT incubator.apache.org.