Group for FC-5

[Eric Tanguy]

I have some questions regarding the group software in FC-5:
drgeo in spec : Group: Applications/Engineering but in repoview it's in
education

drgeo-doc in spec : Group: Applications/Engineering but in repoview it's
in nogroup

freehdl in spec : Group: Applications/Engineering but in repoview it's
in nogroup

gperiodic in spec : Group: Applications/Engineering but in repoview it's
in education

ircd-hybrid in spec : Group: System Environment/Daemons but in repoview
it's in network server

qucs in spec : Group: Applications/Engineering but in repoview it's in
nogroup

ushare in spec : Group: Applications/Multimedia but in repoview i's in
nogroup.

So it seems in fc-5 the group is important to look for packages and i
would like to know the group is attributed to a package because it seems
to not take care of the group in spec file ?
Is there any recommendations about which groups are allowed and how
attribute a package to a group.
Thanks
Eric