OASIS Open

Oracle

No

I believe the only logical reason for this restriction is the belief that the two attributes are one and the same and that the same result will be returned for each. If this is true, I do not see why it is necessary to return an error, force the client to reformulate the request and resend the request when the server knows from the first "erroneous" request what response is desired.

If on the other hand you think there are cases where asking for the same attribute more than once is sensible, all the more reason not to prohibit it.