http://fedoraproject.org/extras/4/i386/repodata/

Sat Jul 16 01:57:13 UTC 2005

On 7/15/05, Eric R. Meyers <ermeyers at adelphia.net> wrote:
> yum --disablerepo=extras-development groupinfo 'Engineering and Scientific'

you disabled extras-development  but development is still enabled.
The comps files you show is from extras-development. As a result you
are seeing the members of Engineering and Scientific from the Core
development tree.

Assuming you have a normal yum configure for the development tree.  If
you want to just see the members from extras development you would do:

yum --disablerepo=development groupinfo 'Engineering and Scientific'

Core has a comps file  and Extras as a seperate comps file.  Yum
merges groups listed in both files.  Look at the Enginnering and
Scieintific group definition in both these files:
http://download.fedora.redhat.com/pub/fedora/linux/core/development/i386/repodata/comps.xml
http://download.fedora.redhat.com/pub/fedora/linux/extras/development/i386/repodata/comps.xml