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Subject: Fw: [xacml] [Polar] PH09: New section 7.4.2 Attributes
'or' is not a bag function, so it does not care about any bags: empty or not. one of it's arguments may raise an indeterminate but it does not have anything to do with bags. Simon > ----- Original Message ----- > From: "Seth Proctor" <seth.proctor@sun.com> > To: "Simon Godik" <simon@godik.com> > Cc: <xacml@lists.oasis-open.org> > Sent: Monday, November 04, 2002 10:46 AM > Subject: Re: [xacml] [Polar] PH09: New section 7.4.2 Attributes > > > > > > On Mon, Nov 04, 2002 at 10:22:56AM -0800, Simon Godik wrote: > > > functions that do not take attribute bags as arguments do not care about > > > empty bags. > > > > Untrue. An or function, for instance, is supposed to go through a list of > > inputs until it finds a true value. If one of those inputs fails to find > any > > values, and the MustBePresent attribute is false, then an empty bag is > > returned. This is done precisely so that the function may skip over that > > input and continue on (whereas it might choose to do something different > in > > an error case). Functions that do not take attribute bags as arguments may > > still need to recognize the special case of an empty bag. > > > > > > seth > > > > > > >
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