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http://refeds.org/category/research-and-scholarship

A Service Provider that conforms to R&S exhibits the following entity attribute in its metadata:

<mdattr:EntityAttributes xmlns:mdattr="urn:oasis:names:tc:SAML:metadata:attribute">
  <!-- entity attribute for SPs that conform to R&amp;S -->
  <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">
    <!-- the refeds.org R&amp;S entity attribute value -->
    <saml:AttributeValue>
      http://refeds.org/category/research-and-scholarship
    </saml:AttributeValue>
  </saml:Attribute>
</mdattr:EntityAttributes>

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If a Service Provider requests a particular an R&S attribute, the Identity Provider is REQUIRED to release it. Thus one or more R&S attributes MUST be listed in Service Provider metadata, otherwise the Identity Provider may release nothing at all.

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An Identity Provider is NOT REQUIRED to release an R&S attribute to a given R&S Service Provider unless that attribute is requested in Service Provider metadata. In particularConversely, an Identity Provider that supports the R&S category MUST release the attributes shown below upon request from the Service Provider:

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An Identity Provider that supports R&S releases at least refedsNonPrivateUserID and refedsEmailAddress. Some Identity Providers will release refedsPersonName as well. Presumably the this latter group of Identity Providers do not filter on requested attributes in metadata.

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