This is a transitional package to smooth upgrades from earlier Shibboleth versions. The schemas are now provided by shibboleth-sp2-common. This package can be removed once the upgrade is complete.
The Shibboleth System is a standards based software package for web single sign-on across or within organizational boundaries. It supports authorization and attribute exchange using the OASIS SAML 2.0 protocol. Shibboleth allows sites to make informed authorization decisions for individual access of protected online resources while allowing users to establish their identities with their local authentication systems.