[NTG-context] How to realize rubytext in Context?

Hi, for an multilanguage document I need to write some rubytext. But I have no idea how to realize this in context. Math-mode is not a solution as the line-breaks with longer rubytext - but maybe it is the only way. Hints are very welcome. Here is a good and short explanation what rubytext

[NTG-context] System commands are disabled

Hi there, I have the following code from ConTeXt wiki. I tried it in http://live.contextgarden.net/ and the output is correct. But when I tried it in the ConTeXt from TeXLive 2007, the metapost graph is not displayed in the final pdf file. Any ideas? --8---cut