InCommon Federation registration
Rice's identity provider is registered in InCommon, the US research and education identity federation, and InCommon's metadata query service returns a signed EntityDescriptor for entityID https://idp.rice.edu/idp/shibboleth with registrationAuthority https://incommon.org. A federation is shared by definition; the entity inside it is Rice's, and this membership is what makes Rice's IdP usable by every other InCommon participant. Recorded as a relationship, never as Rice's contract.