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[Bug 6398] WS-Transfer violates WS-I BP w.r.t. the use of types

From: <bugzilla@wiggum.w3.org>
Date: Tue, 20 Jan 2009 21:30:10 +0000
To: public-ws-resource-access-notifications@w3.org
Message-Id: <E1LPOAk-0005Hd-36@wiggum.w3.org>


Robert Freund <bob@freunds.com> changed:

           What    |Removed                     |Added
                 CC|                            |bob@freunds.com

--- Comment #1 from Robert Freund <bob@freunds.com>  2009-01-20 21:30:09 ---
proposal from

  below is a modified version of the proposal, showing the pseudo schema 
changes to T and RT (some of the cardinalities will vary slightly from 
previous proposal and from the specs in an effort to ensure things are 
consistent and allow for RT to do its job) - I tried to make a note of 
each one as I detected it (hopefully the following shows up ok for 
everyone - if not let me know and I'll put it into a separate file):

T-GetRequest:                 RT-GetRequest:
<wst:Get ... >                <wst:Get Dialect="xs:anyURI" ...>
 xs:any *                       <wsrt:Expression ...> xs:any 
</wsrt:Expression> *
</wst:Get>                    </wst:Get>
Note: to allow for more than one Expression, I had to change the 'xs:any 
?' to a "xs:any *" on the xs:any of the T.Get(), and for full 
extensibility (an attribute on Get could make the need for children 

T-GetResponse:                RT-GetResponse:
<wst:GetResponse ...>         <wst:GetResponse ...>
 xs:any +                         <wsrt:Result...>xs:any</wsrt:Result> +
</wst:GetResponse>            </wst:GetResponce>
Note: We should consider changing the "xs:any +" to "xs:any *" since the 
resource representation could technically be empty and we should allow for 
that (<wsrt:Result>+ too), and for full extensibility (an attribute on 
GetResponse could make the need for children unnecessary).

T-PutRequest:                 RT-PutRequest:
<wst:Put ...>                 <wst:Put Dialect="xs:anyURI" ...>
 xs:any +                       <wsrt:Fragment ...> +
</wst:Put>                    <wst:Put>
Note: We should change "xs:any +" to "xs:any *" to allow for an empty 
represenation to be 'put', and for full extensibility (an attribute on Put 
could make the need for children unnecessary).

T-PutResponse:                RT-PutResponse:
<wst:PutResponse ...>         <wst:PutResponse ...>
 xs:any ?                       xs:any ?
</wst:PutResponse>            </wst:PutResponse>
Note: We should change the "xs:any ?" to "xs:any *" to allow for full 

T-DeleteRequest:              RT-DeleteRequest:
<wst:Delete ...>              <wst:Delete ...>
  xs:any *                      xs:any *
</wst:Delete>                 </wst:Delete>
Note: I added the "xs:any *" extensibility point in here.

T-DeleteResponse:             RT-DeleteResponse:
<wst:DeleteResponse ...>      <wst:DeleteResponse>
 xs:any ?                       xs:any ?
</wst:DeleteResponse>         </wst:DeleteResponse>
Note: We should change the "xs:any ?" to "xs:any *" to allow for full 

T-CreateRequest:              RT-CreateRequest:
<wst:Create ...>              <wst:Create Dialect="xs:anyURI" ...>
 xs:any *                       <wsmex:Metadata ...> ?
                                <wsrt:Fragment ...> *
</wst:CreateRequest>          </wst:CreateRequest>
Note: I changed the "xs:any +" to "xs:any *" for three reasons: 1) it 
seems like it should be possible to allow the entire resource to have 
default values, 2) per the RT spec the mex and fragment elements are 
optional, 3) to allow for full extensibility (an attribute on the Create 
could make up for the absence of child elements).

T-CreateResponse:             RT-CreateResponse:
<wst:CreateResponse ...>      <wst:CreateResponse ...>
  <wst:ResourceCreated>         <wst:ResourceCreated>
  xs:any ?                      xs:any ?
</wst:CreateResponse>         </wst:CreateResponse>
Note: We should change the "xs:any ?" to "xs:any *" to allow for full 

We should discuss the "xs:any ?" -> "xs:any *" notes I made - if there 
isn't any objection we can include it as part of this.

STSM  |  Web Services Architect  |  IBM Software Group
(919) 254-6905  |  IBM T/L 444-6905  |  dug@us.ibm.com

Geoff Bullen <Geoff.Bullen@microsoft.com> 
Sent by: public-ws-resource-access-request@w3.org
01/16/2009 12:09 PM

Doug Davis/Raleigh/IBM@IBMUS
"public-ws-resource-access@w3.org" <public-ws-resource-access@w3.org>
RE: issue 6398: updated proposal

A couple of things:
1)      I believe the ?xs:any? defined in GetResponse, PutRequest, 
CreateRequest should actually be ?xs:any +? defining  one or more.
2)      I am wondering if, for the sake of consistency and extensibility, 
we should also be looking at the GetMetadata Request and Response messages 
in MEX and adding a similar outer wrappers and extensibility concepts?

From: public-ws-resource-access-request@w3.org 
[mailto:public-ws-resource-access-request@w3.org] On Behalf Of Doug Davis
Sent: Thursday, January 15, 2009 6:36 AM
To: public-ws-resource-access@w3.org
Subject: issue 6398: updated proposal

per my AI from yesterday, the updated pseudo schema for the wrapped 
WS-Transfer operations would be: 

<wst:Get ... >
 xs:any ?

<wst:GetResponse ...>

<wst:PutRequest ...>

<wst:PutResponse ...>
 xs:any ?

<wst:DeleteResponse ...>
 xs:any ?

<wst:CreateRequest ...>

<wst:CreateResponse ...> 
  xs:any ?   

In looking at how this impacts RT... it shouldn't. RT overrides T's Body 
(in some cases already using a wrapper similar to the above) so that can 
continue as is. The only thing missing from the previous proposal was the 
extensibilty points on the wrapper elements so that attributes could be 
added - but that was a typo :-) .  Existing RT can continue to override 
the the above messages with a well defined element - this, along with the 
RT header allows the receiver to know this isn't a normal/vanilla Transfer 

There is no impact on MEX.  I couldn't find any reference to the transfer 
operations that needed to be changed - no samples using it either. 

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Received on Tuesday, 20 January 2009 21:30:20 UTC

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