Several name forms for a structural object class?

HI! Looking at section 4.1.7.2. "Name Forms" in http://www.ietf.org/rfc/rfc4512.txt it's not really clear to me whether more than one name form may be associated with the same structural object class. I think it's possible (and I've implemented it that way in web2ldap) but the server I'm currently testing with disallows it. Ciao, Michael.