This function takes the following parameters:
The Slapi_RDN structure containing the RDN value(s).
Indicates the position of the RDN that precedes the currently desired RDN.
Repository that will hold the type (cn, o, ou, etc.) of the next (index+1) RDN. If this parameter is NULL at the return of the function, the RDN does not exist.
Repository that will hold the value of the next (index+1) RDN. If this parameter is NULL, the RDN does not exist.