Hi Wolfgang Nice, and your example works. But why mine does not??

\setupinteraction [state=start, color=red] % \goto and \from

\setupurl [color=orange] % \url

\useURL[149][http://xkcd.com/149/][][I prefer hot dogs.] \useURL[224][http://xkcd.com/224/]

\starttext \startlines \goto{In Lua, array indices start from one.}[url(http://www.xkcd.com/163/)] \from[149] \url [224] \stoplines \stoptext

Wolfgang

-- Best Regards, Vyatcheslav Yatskovsky