RE: merge/replace selection criteria

[Gil Kirkpatrick <gilk@netpro.com>]

The key concept Bob points out is instance identification. Specifying key
attributes is certainly one way to do that, but it strikes me as somewhat
difficult to implement. For instance, who is responsible for guaranteeing
uniqueness of the keys? 

Instad of key attributes, why not use an unambiguous path description to
specify a node instance in the XML doc. A small subset of XPATH would be
sufficient, e.g. LocationPath as described by 2[1] of
http://www.w3.org/TR/xpath.

Gil Kirkpatrick
CTO, NetPro


-----Original Message-----
From: Robert Moore [mailto:remoore@us.ibm.com] 
Sent: Tuesday, August 26, 2003 7:39 AM
To: Brendan Kelly
Cc: 'netconf@ops.ietf.org'; owner-netconf@ops.ietf.org; 'Phil Shafer'; 'Paul
Sangree'
Subject: RE: merge/replace selection criteria






> I believe the xxx:key="key" should be stated in the "enns" draft as
optional.
I think this would be a mistake.  Instance identification is a fundamental
part of any management protocol -- in fact, I can't think of anything that's
more fundamental.  You need to come up with *one* approach to identifying
instances that works for both managers and agents, and then state that it
MUST be used for instance identification.  A management application has
better things to do than implement several different instance-identification
schemes, and then consult a capabilities statement at runtime to decide
which one to use for a given agent.

Or have I misunderstood what's being proposed here?

Regards,
Bob

Bob Moore
WebSphere Advanced Design and Technology
WebSphere Platform System House
IBM Software Group
+1-919-254-4436
remoore@us.ibm.com


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