In order to encourage the clear and consistent operation of federated authentication between Service Providers (such as scholarly publishers), Identity Providers (such as campus IT administrators), and other stakeholder groups (such as librarians), the SeamlessAccess Entity Categories and Attribute Bundles Working Group has proposed three specifications that aim to provide a common set of terms and definitions for use when describing exactly what information should be requested by the Service Provider as well as what should be released (if any) by the institution to enable access to online materials.