Am 09.01.2011 um 16:57 schrieb Vyatcheslav Yatskovsky:

> Hi,
> 
> How to invoke pre-defined Unicode symbols?

Use a font with the symbols.

\starttext
Symbols: \definedfont[file:Symbola sa 2]♩♪
\stoptext

You can download the font here: http://users.teilar.gr/~g1951d/

Wolfgang