Hi Rich,
Yes, you are right. It seems Remon did not notice the description of
<AnyOf> in 5.6, which is correct. 7.7 correctly says that an
empty target will always match, though the case is not listed in the
table. So no action should be required on this.
Best regards,
Erik
On 2011-06-16 07:50, rich levinson wrote:
Hi Erik,
On the last item, I don't understand what is going to be "fixed".
Also, I do not see any inconsistency between 5.6 and 7.7.
I think both situations:
zero <AnyOf> elements
and one or more <AnyOf> elements
appear to be covered in both sections 5.6 and 7.7 in a consistent
manner. Or am I missing something?
Thanks,
Rich
On 6/15/2011 7:11 AM, Erik Rissanen wrote:
Remon,
See inline.
On 2011-06-10 09:51,
wrote:
Erik,
-----Original Message-----
From: Erik Rissanen [mailto:]
Sent: Thursday, June 09, 2011 11:27 AM
To:
Subject: Re: [xacml] wd-20 issues
5.29
Element<AttributeDesignator>
"If the Issuer is not present in the attribute
designator, then
the matching of the attribute to the named attribute SHALL
be governed
by AttributeId and DataType attributes alone."
- And Category.
Yes!
Also in 7.3.4 Attribute Matching.
5.48 Element<Result>
"<PolicyIdentifierList> [Optional]
If the ReturnPolicyIdList attribute in the<Request>
is true (see section 5.42), a PDP that implements this
optional feature MUST return a list of all policies which were
found to be fully applicable."
- This prevents the PDP from skipping evaluation of policies
that cannot affect the decision. IOW, it prevents performance
optimizations. This is not a big deal to me, since the feature
is optional, but maybe something to note in the implementer's
guide?
The intended behavior is not how you interpret it. It says
"which were found..." so it's simply the list of policies the
PDP worked on during evaluation. It does not mean that the PDP
has to figure out which policies "might have been fully
applicable if they were to be evaluated". If you have a
suggestion for better wording, please post it, and I can update
this while we are fixing the other issues.
7.3.7 AttributeSelector evaluation
"If the DataType is not one of the primitive types listed
above, then the return values shall be constructed from the
nodeset in a manner specified by the of the particular
DataType extension specification."
- "specified by the of the" misses a crucial noun.
It should just say "in a manner specified by the particular
datatype extension specification", meaning that if you extend
XACML with a custom data type, you also need to define (and
implement) this constructor.
7.7 Target evaluation
"An empty target matches any request. Otherwise the target
value SHALL be "Match" if all the AnyOf specified in the
target match values in the request context."
- This conflicts with 5.6 Element<Target>: "For the
parent of the<Target> element to be applicable to the
decision request, there MUST be at least one positive match
between each<AnyOf> element of the<Target>
element and the corresponding section of the<Request>
element."
Yes, I will fix that. Thanks for noticing.
Thanks,
Ray
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