RE: [xacml] urn:oasis:names:tc:xacml:1.0:function:present

On Tue, 29 Jun 2004, Anne Anderson wrote:

> If someone wants to avoid errors where an attribute is
> not present, they either put the test for the attribute in the
> Target, or set MustBePresent=false and test for the size of the
> resulting bag.

Good point.

The non-error operation of a desinator will always return a zero length
bag in the case that their are no attributes matching the designator
criteria.

-Polar