YUM : group file

http://ramblings.narrabilis.com/wp/creating-a-yum-repository-repo-and-creating-a-yum-group-to-install-kickstart/

Specify the group file when createrepo

$ createrepo -g comps.xml MyRepo

Use yum group command to show group
$ yum grouplist

[Note] 20110413
https://fedoraproject.org/wiki/How_to_use_and_edit_comps.xml_for_package_groups