RE: A question about SPPI

["Da Silva, Pedro" <pdasilva@orchestream.com>]

Man, Ravi,

The uniqueness clause also states that "The specified set of attributes
provide a necessary and sufficient set of values by which to identify an
instance of this PRC".
As such does an optional attribute constitute a necessary one for UNIQUENESS
clauses?
Also, considering the case where a UNIQUENESS clause's set is composed of
optional attributes only, does that constitute a sufficient set by which to
identify an instance of the PRC?

cheers,
Pedro



-----Original Message-----
From: Sahita, Ravi [mailto:ravi.sahita@intel.com]
Sent: Wednesday, January 30, 2002 11:50 PM
To: 'Man.M.Li@nokia.com'; rap@ops.ietf.org
Subject: RE: A question about SPPI


Man Li,

The UNIQUENESS clause itself is optional. The SPPI does
not put any constraints on which attributes can be specified
in this clause other than - 
1.  The attribute named in the PIB-INDEX clause may not be 
    present in the UNIQUENESS clause.  
2. An attribute may not appear more than once in a UNIQUENESS 
   clause. 

So, yes, the UNIQUNESS clause can contain optional attributes
as long as it follows the rules above.

Hope that helps,
Ravi

-----Original Message-----
From: Man.M.Li@nokia.com [mailto:Man.M.Li@nokia.com] 
Sent: Monday, January 28, 2002 11:08 AM
To: rap@ops.ietf.org
Subject: A question about SPPI


In a PIB table, some attributes can be optional. Should the UNIQUENESS
clause exclude optional attributes? In other words, can a UNIQUENESS clause
contain any optional attributes?

Man Li