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Subject: Re: [xacml-comment] no rules or policies
On Wed, 27 Nov 2002, Seth Proctor wrote: > As a side note, I don't really understand what the value is of having a Policy > with no Rule, since it will always return the same thing (probably N/A), so > why bother going through the effort of evaluating it? In other words, what > is the reason for the schema defining PolicyType to have > > <xs:element ref="xacml:Rule" minOccurs="0" ... The reason is that XACML (in the long run) will most likely be generated by tools. I can't see anybody that would want to really write such copious verbage at the keyboard. When generating from other laguages or GUIs it is quite easy to end up with policies with no rules, conjunctives or disjunctives with no elements, etc. For logical completeness, these cases should be allowed and handled in a logically sound manner. Also, if the minimum administrative element for a PDP is the policy. One use case, Let's say that you will dynamically add rules, so to start you have no rules, but you still have to configure your PDP with a policy there. So you shouldn't force people to have rules where they don't have any. Cheers, -Polar > > > seth > > ---------------------------------------------------------------- > To subscribe or unsubscribe from this elist use the subscription > manager: <http://lists.oasis-open.org/ob/adm.pl> >
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