Hi,
For IOS 12.4 I would recommend the command reference :
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_book.html
For the "policy-map" and "class-map" commands especially have a look at:
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_n1.html#wp1033055
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_a1.html#wp1047911
One note though, as you did not specify any hardware: please be aware that there might be slight deviations in different platforms. In case you are looking for information about these commands for a particular hardware platform, please consult the QoS command reference of that platform.
Hope this helps! Please use the rating system.
Regards,
Martin
