RE: [xacml-users] Combining algorithms and "AND" and "OR"

["Kuketayev, Argyn \(Contractor\)" <argyn_kuketayev@fanniemae.com>]

I agree that they are not exactly like boolean operators, but even with
four values they appear to behave more or less like OR and AND
operators. This analogy helps me to write poicies.

> -----Original Message-----
> From: Anne Anderson [mailto:Anne.Anderson@Sun.COM] 
> Sent: Wednesday, April 13, 2005 2:44 PM
> To: Kuketayev, Argyn (Contractor)
> Cc: xacml-users@lists.oasis-open.org
> Subject: Re: [xacml-users] Combining algorithms and "AND" and "OR"
> 
> 
> They are roughly equivalent, but not completely.  They differ 
> from Boolean AND and OR in operating on 4 values - "Permit", 
> "Deny", "NotApplicable", and "Indeterminate" - rather than on 
> 2 ("True", "False").  If "Permit" is treated as equivalent to 
> "True", and "Deny" is treated as equivalent to "False", and 
> if none of the rules or policies returns "NotApplicable" or 
> "Indeterminate", then I believe they are equivalent.
> 
> Anne
> 
> Kuketayev, Argyn (Contractor) wrote:
> > Can I say that "deny-overrides" is equal to multiplication ("AND"
> > operator) of results of each rule or policy? Subsequently, 
> > "permit-overrides" is "OR" operator?
> > 
> > Thanks,
> > Argyn
> 
> -- 
> Anne H. Anderson             Email: Anne.Anderson@Sun.COM
> Sun Microsystems Laboratories
> 1 Network Drive,UBUR02-311     Tel: 781/442-0928
> Burlington, MA 01803-0902 USA  Fax: 781/442-1692
> 
>