[NTG-context] \useURL third parameter

[John Culleton]

I find in the wiki examples of \useURL. The third parameter is however a 
mystery to me. What is it used for? 
-- 
John Culleton
Resources for every author and publisher:
http://wexfordpress.com/tex/shortlist.pdf
http://wexfordpress.com/tex/packagers.pdf
http://www.creativemindspress.com/newbiefaq.htm
http://www.gropenassoc.com/TopLevelPages/reference%20desk.htm