NameIDFormat="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress" we are using if we need to authenticate a user based on email address.if we need to use username as name id field what should be the nameid format.i got confused .Could any one can help what would be the correct nameid for to authenticate user with username and what would be the consequences if we use nameid-format as "unspecified" please help and i am new to saml concept.