+### Facts
+
+There are a few facts included within the apt module describing the state of the apt system:
+
+* `apt_updates` - the number of updates available on the system
+* `apt_security_updates` - the number of updates which are security updates
+* `apt_package_updates` - the package names that are available for update. On Facter 2.0 and newer this will be a list type, in earlier versions it is a comma delimitered string.
+
+#### Hiera example
+<pre>
+apt::sources:
+ 'debian_unstable':
+ location: 'http://debian.mirror.iweb.ca/debian/'
+ release: 'unstable'
+ repos: 'main contrib non-free'
+ required_packages: 'debian-keyring debian-archive-keyring'
+ key: '9AA38DCD55BE302B'
+ key_server: 'subkeys.pgp.net'
+ pin: '-10'
+ include_src: 'true'
+ include_deb: 'true'
+
+ 'puppetlabs':
+ location: 'http://apt.puppetlabs.com'
+ repos: 'main'
+ key: '1054B7A24BD6EC30'
+ key_server: 'pgp.mit.edu'
+</pre>
+