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Re: TAG Request for Change to WS Addressing Core

From: Mark Nottingham <mark.nottingham@bea.com>
Date: Tue, 25 Oct 2005 15:29:18 -0700
Message-Id: <9E7282B9-2ECF-40E4-8F9F-8A72CC416347@bea.com>
Cc: www-tag@w3.org
To: Noah Mendelsohn <noah_mendelsohn@us.ibm.com>

Thank you, Noah; I'll record this as a CR issue and instigate  
discussion in the WG.

For my information, could you give an indication of the nature and  
scope of "other aspects of TAG issue endPointRefs-47," and when you  
expect to resolve them (even in rough terms)? This will help plan our  
future work.

Kind regards,

On 25/10/2005, at 3:15 PM, noah_mendelsohn@us.ibm.com wrote:

> Promoting effective use of the World Wide Web is of course the  
> raison d'Ítre of the W3C and of the TAG in particular.  So, it's  
> worth some care to ensure that every W3C Recommendation integrates  
> well with the Web.  The use of a single naming mechanism (URI) for  
> all resources is key to the network effects that underly the  
> extraordinary success of the Web[1], and so the TAG pays particular  
> attention to ensuring that Recommendations make appropriate use of  
> URIs.
> WSA End Point References [2] contain an [address] property which is  
> a URI [3], but the TAG is concerned that other non-URI properties  
> will also sometimes be used for resource identification.  We also  
> have come to understand that there are practical reasons why the  
> Web Services community finds XML-based, QNamed parameters to be  
> powerful and convenient, and that those advantages sometimes extend  
> to their use for identification.  For example, we are aware that  
> there is a large body of widely deployed software that aids in the  
> creation and processing of SOAP headers, including those resulting  
> from bound EPR parameters.  Taking all these factors together, the  
> TAG today resolved to ask that the Web Services Addressing Working  
> Group include the following note in a suitable section of the Web  
> Services Addressing 1.0 - Core Proposed Recommendation:
> -----
> Note: Web Architecture dictates that resources should be identified  
> with URIs.  Thus, use of the abstract properties of an EPR other  
> than wsa:address to identify resources is contrary to Web  
> Architecture.  In certain circumstances, use of such additional  
> properties may be convenient or beneficial, perhaps due to the  
> availability of QName-based tools.  When building systems that  
> violate this principle, care must be taken to weigh the tradeoffs  
> inherent in deploying resources that are not on the Web.
> -----
> We hope that this strikes a reasonable balance between promoting  
> effective use of the Web, and recognizing the other factors that  
> appropriately contribute to design and implementation choices.   
> FYI, discussion of other aspects of TAG issue endPointRefs-47 [4]  
> is ongoing.  We welcome followup discussion on the public www- 
> tag@w3.org mailing list.
> Thank you very much.
> Noah Mendelsohn
> For the W3C Technical Architecture Group
> [1] http://www.w3.org/TR/webarch/#uri-benefits
> [2] http://www.w3.org/TR/2005/CR-ws-addr-core-20050817/#eprs
> [3] http://www.w3.org/TR/2005/CR-ws-addr-core-20050817/#eprinfomodel
> [4] http://www.w3.org/2001/tag/issues.html#endPointRefs-47
> --------------------------------------
> Noah Mendelsohn
> IBM Corporation
> One Rogers Street
> Cambridge, MA 02142
> 1-617-693-4036
> --------------------------------------

Mark Nottingham   Principal Technologist
Office of the CTO   BEA Systems
Received on Tuesday, 25 October 2005 22:29:48 UTC

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