Sorry, yes, I meant AttributeDesignator. -Anne
>
>What is an AttributeDescriptor?
>
>Do you mean AttributeDesignator or have I missed something?
>
>-Polar
>
>On Thu, 17 Jun 2004, Anne Anderson wrote:
>
>> I would like to propose that we add an optional "OneAndOnly" XML
>> attribute to the <AttributeDescriptor> element. If this
>> attribute is "true", it causes the <AttributeDescriptor> to
>> evaluate to a single element of its DataType, rather than a bag
>> of such elements. If this XML attribute is used, and the
>> <AttributeDescriptor> matches no element or more than one
>> element, then the evaluation result will be "Indeterminate". The
>> default value of the OneAndOnly Attribute is "false".
>>
>> The intent is that
>>
>> <SomeAttributeDescriptor AttributeId="x" DataType="y" OneAndOnly="true"/>
>>
>> be exactly equivalent to
>>
>> <Apply FunctionId="y-one-and-only">
>> <SomeAttributeDescriptor AttributeId="x" DataType="y""/>
>> </Apply>
>>
>> Rationale:
>>
>> All our standard functions except for the specific bag
>> functions expect a single value, so the case for expecting and
>> wanting a single attribute is extremely common. It is awkward,
>> verbose, and probably confusing to wrap all instances of
>> <AttributeDescriptor> with an <Apply> of a "*-one-and-only"
>> function.
>>
>> Anne
>> --
>> Anne H. Anderson Email:
>> Sun Microsystems Laboratories
>> 1 Network Drive,UBUR02-311 Tel: 781/442-0928
>> Burlington, MA 01803-0902 USA Fax: 781/442-1692
>>
>>
>> To unsubscribe from this mailing list (and be removed from the roster of the
>OASIS TC), go to
>http://www.oasis-open.org/apps/org/workgroup/xacml/members/leave_workgroup.php.
>>
>
>To unsubscribe from this mailing list (and be removed from the roster of the
>OASIS TC), go to
>http://www.oasis-open.org/apps/org/workgroup/xacml/members/leave_workgroup.php.
>
