Re: [ws-rx] I just posted a PR comment on MakeConnection Policy assertion

[Tom Rutt <tom@coastin.com>]

Tom Rutt wrote:
> Tom Rutt wrote:
>> Doug Davis wrote:
> I now understand that your changes are required since make connection 
> can also be used for delivering requests.
>
> Thus I agree with our changes to my proposal.
>
> However we still need to discuss the need for a statement on Non 
> Presence implying prohibition.
After talking to some ws-policy experts, it seems that because 
MakeConnection is a first level policy assertion type, lack of presence 
of this assertion anywhere in a policy alternative says nothing about 
its use.

The difference with ws addressing nested paramters is that they are 
defined within the context of the first level assertion "addressing" .  
This for these nested parameters, non presence within an asseretion of 
"addressing" policy  implies prohibition of that alternative.

The tricky part is if a policy has two alternatives, and one of those 
alternative includes the
MakeConnection assertion, that policy statement has introduced 
MakeConnection into the policy vocabulary.  In such a case, does absence 
in one of the assertions imply not using make connection?

eg

<wsp:Policy>
<wsp:ExactlyOne>
<wsp:All>
<wsmc:MakeConnection/>
</wsp:All>
<wsp:All>
<-- does this alternative prohibit use of MakeConnection?? -->
</wsp:All>
</wsp:ExactlyOne>
</wsp:Policy>

>
> This discsussion needs to distinguish an endpoint which has no policy 
> statement attached, from one which has policy attached, but does not 
> include the makeConnection assertion in any alternative.
>>>
>>> Tom,
>>> you proposed:
>>> Change lines 327 – 329 from:
>>> “
>>> The MakeConnection policy assertion indicates that the MakeConnection
>>> protocol (operation and the use of the MakeConnection URI template in
>>> EndpointReferences) is supported. This assertion has Endpoint Policy
>>> Subject [WS-PolicyAttachment].
>>> “
>>> To
>>> “
>>> The MakeConnection policy assertion indicates that the MakeConnection
>>> protocol (operation and the use of the MakeConnection URI template in
>>> EndpointReferences) is required for instances of replies. This
>>> assertion has Endpoint Policy Subject [WS-PolicyAttachment].
>>> “
>>> Since MC doesn't talk about any EPR in particular I think it would 
>>> make more sense to reword as:
>>> “
>>> The MakeConnection policy assertion indicates that the MakeConnection
>>> protocol (operation and the use of the MakeConnection URI template in
>>> EndpointReferences) is required for messages from this endpoint. This
>>> assertion has Endpoint Policy Subject [WS-PolicyAttachment].
>> your wording removed "required for instances of replies". Is this 
>> because you wish it to be used for requests as well.?
>>> “
>>> And then you suggested:
>>> Change line 334 from:
>>> “
>>> A policy assertion that specifies that the MakeConnection protocol is
>>> supported.
>>> “
>>> To
>>> “
>>> A policy assertion that specifies that the MakeConnection protocol is
>>> required for instances of replies from an endpoint.
>>> “
>>> And I would suggest this instead:
>>> “
>>> A policy assertion that specifies that the MakeConnection protocol is
>>> required for instances of messages from this endpoint.
>>> “
>>>
>> same question, I assumed makeConnection is for responses, are you
>> are pointing out it can also be used for requests?
>> Tom
>>> As to Paul's question of severity of this change, it would seem that
>>> your text is still consistent with the intent of the original text,
>>> as such it seems like a non-substantive change. Would you agree?
>>>
>>> thanks
>>> -Doug
>>> ______________________________________________________
>>> STSM | Web Services Architect | IBM Software Group
>>> (919) 254-6905 | IBM T/L 444-6905 | dug@us.ibm.com
>>>
>> ----------------------------------------------------
>> Tom Rutt    email: tom@coastin.com; trutt@us.fujitsu.com
>> Tel: +1 732 801 5744          Fax: +1 732 774 5133
>>
>>
>
>


-- 
----------------------------------------------------
Tom Rutt	email: tom@coastin.com; trutt@us.fujitsu.com
Tel: +1 732 801 5744          Fax: +1 732 774 5133