[boost] request for boost:::program_options ...

Hi, I need a way of storing/retrieving options for an application. However, although boost::program_options seemed an obvious choice, it doesn't seem able to store options - it merly reads them in. I also couldn't find any documention on how its cfg files should be formatted for use with po::parse_config_file. Could we please have a way of storing program options also? I couldn't find information on why this feature wasn't implemented in the rationale. Also, documentation on how streams should be formatted for use with po::parse_config_file is missing. Regards, Asger