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All of the above attributes are defined or referenced in the [eduPerson] specification. The specific naming and format of these attributes are is guided by the protocol in use. In the case of SAML 2.0 the [SAMLAttr] profile MUST be used. This specification may be extended to reference other protocol-specific formulations as circumstances warrant.

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A Service Provider that conforms to R&S would exhibit the following EntityAttribute entity attribute in SAML metadata:

<mdattr:EntityAttributes xmlns:mdattr="urn:oasis:names:tc:SAML:metadata:attribute">
  <saml:Attribute
      xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
      NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri"
      Name="http://macedir.org/entity-category">
    <saml:AttributeValue>http://refeds.org/category/research-and-scholarship</saml:AttributeValue>
  </saml:Attribute>
</mdattr:EntityAttributes>

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For the purposes of effective access control, A persistent, non-reassigned, non-targeted identifier is REQUIRED. If the Identity Provider’s deployment of eduPersonPrincipalName is non-reassigned, and the organization believes in good faith that it will remain so, it will suffice. Otherwise the Identity Provider MUST release eduPersonTargetedID (which is non-reassigned by definition) in addition to eduPersonPrincipalName. In any case, release of both identifiers is RECOMMENDED. Likewise the release of all three person name attributes (displayName, givenName, sn) is also RECOMMENDED.

Identity Providers are strongly encouraged to release the entire attribute bundle (both required and optional attributes) defined in Section 5 to R&S category Service Providers, both to maximize interoperability and the scope of supported services. The only optional data element is affiliation, which while different in nature to the rest of the bundle, is important to many R&S services and is a particular differentiator for academic organizations. 

An Identity Provider that supports R&S would exhibit the following EntityAttribute entity attribute in SAML metadata: 

<mdattr:EntityAttributes xmlns:mdattr="urn:oasis:names:tc:SAML:metadata:attribute">
  <saml:Attribute
      xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
      NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri"
      Name="http://macedir.org/entity-category-support">
    <saml:AttributeValue>http://refeds.org/category/research-and-scholarship</saml:AttributeValue>
  </saml:Attribute>
</mdattr:EntityAttributes>

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