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Subject: Re: [xacml] [model] Issues PM-2-02,PM-2-04: Applicability



"Polar Humenn" <polar@syr.edu> wrote:
>But didn't we have some operator like "IF-THEN"
>
><IF-THEN>
>  <...>
>     a complex predicate that SHOULD NOT evaluate to n/a
>  </...>
>  <INAPPLICABLE/>
></IF-THEN>
>
>It would have the same semantics as our applicability predicate.
>With added semantics if the premise evaluated to INAPPLICABLE then the
>entire expression is in Error.

I did propose the <if></if><then></then> syntax, but people found that
confusing.  Since we already had the idea of "applicability rules" being
in the "header" of the <applicablePolicy>, I thought perhaps having this
more detailed "applicability rule" also in the header would be easier
to swallow :-)

Anne



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