IdPs are encouraged to release the essential attribute bundle to the broadest class of SPs possible:
Identifier
eduPersonPrincipalName
Mail attribute
mail
Person name attributes
displayName
givenName
sn (surname)
If your deployment of eduPersonPrincipalName is non-reassigned, and your IdP releases the essential attribute bundle to all SPs, then your IdP supports the Research & Scholarship Category by definition.