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From Neeraj Joshi <>
Subject Re: policy analysis support
Date Tue, 02 Sep 2008 17:27:40 GMT
I agree this is can be a great addition to Imperius
"The light at the end of the tunnel...may be you"

Neeraj Joshi
WebSphere XD - Compute Grid
Apache Imperius -

Xiping Wang/Watson/IBM@IBMUS 
09/02/2008 11:04 AM
Please respond to


Re: policy analysis support

"Mark A. Carlson" <Mark.Carlson@Sun.COM>

"Mark A. Carlson" <Mark.Carlson@Sun.COM> 
Sent by: Mark.Carlson@Sun.COM 
09/02/2008 10:52 AM 

Please respond to




Re: policy analysis support


I think this would be a great addition.

Xiping Wang wrote:
> All,
> We, at IBM T.J.Watson Research Center, have been developing a policy
> analysis module on top of Imperius that allows a policy writer perform 
> following tasks automatically.
> 1) Dominance check: finding if a policy is dominated by other policies,
> thus removing redundancy among policies.
> 2) Simultaneous applicability check: finding if two policies are
> simultaneously applicable, thus preventing potential conflicts at
> specification time.

Can you define what you mean by applicability?

It means that a policy will be applied if it's condition is evaluated 

> 3) Coverage check: finding if a set of policies covers all the sensor
> spaces required, thus ensuring policies specified adequately.
> 4) Meta policy based conflict detection/resolution: detecting/resolving
> conflicts at runtime.

As in the same conditions elicit conflicting actions?

Two policies can be applied simultenously, but with conflicting actions.

> 4) Rule-based policy transformation: allowing transformation of abstract
> policy into concrete policies or vice versa.
Abstract in the OO sense?

Abstract means high level goals that can not be enforced.

> The package implements advanced algorithms for policy analysis and 
> certain changes to be made to the current Imperius implementation for
> integration.

Any IP regarding this new work?

I believe this needs to be worked out with IBM management and lawyers.

-- mark

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