What does the @ symbol mean next to a repository when doing 'yum list'

Question

What is the meaning of the @ symbol next to the name of the repository in this output:

yum list | grep jdk

jdk.x86_64 2000:1.7.0_25-fcs @puppmst-repo

This is running in CentOS 6.4.

Solution

Man page for yum says this under List Options -
name.arch [epoch:]version-release repo or @installed-from-repo

So I would say you installed jdk.x86_64 from puppmst-repo