Help me please

Hi ,
  I am unable to understand the pattern mentioned in xml schema file.
 
<xsd:pattern value="[\i-[:]][\c-[:]]*:[\i-[:]][\c-[:]]*(@start|@end)"/>
 
The above one is the pattern specified in schema file . I'ld like to know how it looks like in instance document.
 
thanks & regards,
Sridhar

Sridhar Raju Y,
Infosys Technologies Ltd.,
Ph: 91-674-320001-50 x  2644
Mail :sridhar_y@infy.com
www.infy.com