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RE: NEW ISSUE: Marking RefProps/RefParams using attributes

From: Srinivas, Davanum M <Davanum.Srinivas@ca.com>
Date: Thu, 2 Dec 2004 17:06:33 -0500
Message-ID: <87527035FDD42A428221FA578D4A9A5B08811D9D@usilms24.ca.com>
To: "Jonathan Marsh" <jmarsh@microsoft.com>, <public-ws-addressing@w3.org>

Jonathan,

That was a suggestion from Glen. See
http://lists.w3.org/Archives/Public/public-ws-addressing/2004Nov/0602.ht
ml

Thanks,
dims

-----Original Message-----
From: Jonathan Marsh [mailto:jmarsh@microsoft.com] 
Sent: Thursday, December 02, 2004 3:35 PM
To: Srinivas, Davanum M; public-ws-addressing@w3.org
Subject: RE: NEW ISSUE: Marking RefProps/RefParams using attributes

What is the purpose of the <wsa:RefPs soap:mustUnderstand="true"/>
header?  Is it really your intention that any SOAP message with refPs
must insert the header with mustUnderstand="true"?

> -----Original Message-----
> From: public-ws-addressing-request@w3.org [mailto:public-ws- 
> addressing-request@w3.org] On Behalf Of Srinivas, Davanum M
> Sent: Tuesday, November 30, 2004 10:01 AM
> To: public-ws-addressing@w3.org
> Subject: NEW ISSUE: Marking RefProps/RefParams using attributes
> 
> 
> Title: Marking RefProps/RefParams using attributes
> 
> Description: As mentioned in several threads, currently there is no 
> way to distinguish between regular soap headers and RefProps and 
> RefParams just by looking at the soap message on the wire. One could 
> use xml attributes to add extra information on soap headers which have

> been added ONLY because they were part of the original EPR. This is 
> basically to be in tune with the "Self-description" mantra.
> 
> Justification: Different types of intermediaries can use this 
> information for various purposes (say caching, monitoring, 
> logging/auditing). For example a transparent (does not generate EPR's 
> and is not an endpoint for soap messages) intermediary will be able to

> track all Refp's flowing in the system without a user having to input 
> all QName's being used in the system or use some other out of band 
> mechanism. Another benefit is that one can even use the same QName in 
> both RefParams and RefProps IF we are able to mark them in some 
> fashion and we will be able to apply different policies based on 
> whether a QName is being used as a RefParam or present in RefProps. We

> also need a way to ensure that attribute is understood by all nodes 
> (and more importantly fail when the soap nodes does not know how to 
> handle RefParams/RefProps attribute stuff)
> 
> Target: Core
> 
> Proposal:
> - SOAP Headers that are added because they were part of an EPR's 
> ReferenceProperties are marked by adding the following attribute:
> wsa:type="property"
> - SOAP Headers that are added because they were part of an EPR's 
> ReferenceParameters are marked by adding the following attribute:
> wsa:type="parameter"
> - If there's at least one soap header marked with the wsa:type 
> attribute, then add a new header to ensure that the attribute is not 
> ignored silently:
> <wsa:RefPs soap:mustUnderstand="true"/>
> 
> Complete Sample:
> <SOAP-ENV:Envelope>
>      <SOAP-ENV:Header>
>          <wsa:ReferenceParameters soap:mustUnderstand="true"/>
> 
>          <wsa:ReferenceProperties soap:mustUnderstand="true"/>
> 
>          <wsa:MessageID>msgid:1234567902282223</wsa:MessageID>
>          <wsa:To>http://www.example.com/services/someService</wsa:To>
>          <wsa:Action>http://www.example.com/someAction</wsa:Action>
> 
> <wsa:From>http://www.example.com/clients/someClient</wsa:From>
> 
>          ...
>          <tns:resourceID
> wsa:type="property">DataChunk42</tns:resourceID>
>          <tns:expires wsa:type="parameter">32000</tns:expires>
>      </SOAP-ENV:Header>
>      <SOAP-ENV:Body>
>         ...
>      </SOAP-ENV:Body>
> </SOAP-ENV:Envelope>
> 
> Problems:
> [1] Possible Schema validation problem mentioned by Glen:
> (http://lists.w3.org/Archives/Public/public-ws-
> addressing/2004Nov/0602.h
> tml)
> [2] Possible Signing RefProps/RefParams problem mentioned by Rich:
> (http://lists.w3.org/Archives/Public/public-ws-
> addressing/2004Nov/0592.h
> tml)
> 
> Discussion Threads:
> [1]
> http://lists.w3.org/Archives/Public/public-ws-
> addressing/2004Nov/thread.
> html#478
> [2]
> http://lists.w3.org/Archives/Public/public-ws-
> addressing/2004Nov/thread.
> html#544
> 
> 
> Davanum Srinivas
> Computer Associates
> Senior Architect, Web Services Group
> Tel: +1 508 628 8251
> davanum.srinivas@ca.com
> http://ws.apache.org/~dims/
> 
> 
Received on Thursday, 2 December 2004 22:07:07 GMT

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