Confusion about Linux/Redhat source rpm

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I have following 2 packages installed on a Redhat Enterprise 7.0 instance

bind-license-9.9.4-14.el7_0.1.noarch
bind-libs-lite-9.9.4-14.el7_0.1.x86_64

The "repoquery -i" command tells me that the source rpm of these packages is bind.

repoquery -i bind-license-9.9.4-14.el7_0.1.noarch

Name        : bind-license
Version     : 9.9.4
Release     : 14.el7_0.1
Architecture: noarch
Size        : 26019
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
Group       : Applications/System
URL         : http://www.isc.org/products/BIND/
Repository  : rhel-7-server-rpms
Summary     : License of the BIND DNS suite
Source      : **bind-9.9.4-14.el7_0.1.src.rpm**
Description :
Contains license of the BIND DNS suite.
Similarly if I use the yum downloader to download the source rpms of above 2 packages the bind source rpm (bind-9.9.4-14.el7_0.1.src.rpm) is downloaded.

However if we try to update the bind here is what i get

yum update bind
Loaded plugins: product-id, subscription-manager
Package(s) bind available, but not installed.
No packages marked for update

My question is why are repoquery and yumdownloader reporting bind-9.9.4-14.el7_0.1.src.rpm as the source rpm. If bind is the correct source rpm then why is "yum update bind" saying that the bind is not installed on the system?

RY

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